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Blood facts

Approximately 8% of an adult’s body weight is made up of blood.

Females have around 4-5 litres, while males have around 5-6 litres. This difference is mainly due to the differences in body size between men and women.

Its mean temperature is 38 degrees Celcius.

It has a pH of 7.35-7.45, making it slightly basic (less than 7 is considered acidic).

Whole blood is about 4.5-5.5 times as viscous as water, indicating that it is more resistant to flow than water. This viscosity is vital to the function of blood because if blood flows too easily or with too much resistance, it can strain the heart and lead to severe cardiovascular problems.

Blood in the arteries is a brighter red than blood in the veins because of the higher levels of oxygen found in the arteries.

An artificial substitute for human blood has not been found.

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Blood is classified as a connective tissue and consists of two main components:

Plasma, which is a clear extracellular fluid
Formed elements, which are made up of the blood cells and platelets
The formed elements are so named because they are enclosed in a plasma membrane and have a definite structure and shape. All formed elements are cells except for the platelets, which are tiny fragments of bone marrow cells.

Formed elements are:

Erythrocytes, also known as red blood cells (RBCs)
Leukocytes, also known as white blood cells (WBCs)
Platelets
composition-of-blood_450_myVMC-v2
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Leukocytes are further classified into two subcategories called granulocytes which consist of neutrophils, eosinophils and basophils; and agranulocytes which consist of lymphocytes and monocytes.

The formed elements can be separated from plasma by centrifuge, where a blood sample is spun for a few minutes in a tube to separate its components according to their densities. RBCs are denser than plasma, and so become packed into the bottom of the tube to make up 45% of total volume. This volume is known as the haematocrit. WBCs and platelets form a narrow cream-coloured coat known as the buffy coat immediately above the RBCs. Finally, the plasma makes up the top of the tube, which is a pale yellow colour and contains just under 55% of the total volume.

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Blood is composed of 8% whole blood and 92% other fluids/tissues.

Whole blood percentage can be broken down into 55% blood plasma and 45% other formed elements.

Blood plasma consists of proteins, water, and other solutes, with water containing the bulk of the composition whereas formed elements consists of platelets, white blood cells, and red blood cells.

THe proteins in blood plasma contain mostly albumins, globulins, and fibrinogen.

In the formed elements, white blood cells consists of neutrophils lymphocytes, monocytes, eosinophils, and basophils.

Lastly, blood plasma also contains electrolytes, nutrients, gases, waste products, and other regulatory substances.

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The blood is composed of cells, cell fragments and an aqueous solution (plasma).

Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume percentage of all blood cells in the whole blood is about 45% in adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes etc.).

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blood is composed of 55 percent of plasma n formed element respectively .

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blood is composed of 55 percent of plasma n formed element respectively .

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we can also classify these 2 main sections into a lot of different small sections such as the antibody materials , types of protein n others.

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Blood is classified as a connective tissue and consists of two main components:

1. Plasma, which is a clear extracellular fluid

2. Formed elements, which are made up of the blood cells and platelets.All formed elements are cells except for the platelets, which are tiny fragments of bone marrow cells.

Formed elements are:

Erythrocytes, also known as red blood cells (RBCs)

Leukocytes, also known as white blood cells (WBCs)

Platelets

Leukocytes are further classified into two subcategories called granulocytes which consist of neutrophils, eosinophils and basophils; and agranulocytes which consist of lymphocytes and monocytes.

The formed elements can be separated from plasma by centrifuge, RBCs are denser than plasma, and so become packed into the bottom of the tube to make up 45% of total volume. This volume is known as thehaematocrit. WBCs and platelets form a narrow cream-coloured coat known as the buffy coat immediately above the RBCs. Finally, the plasma makes up the top of the tube, which is a pale yellow colour and contains just under 55% of the total volume.

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Red Blood CellsRed blood cells represent 40%-45% of your blood volume. They are generated from your bone marrow at a rate of four to five billion per hour. They have a lifecycle of about 120 days in the body.PlateletsPlatelets are an amazing part of your blood. Platelets are the smallest of our blood cells and literally look like small plates in their non-active form. Platelets control bleeding. Wherever a wound occurs, the blood vessel will send out a signal. Platelets receive that signal and travel to the area and transform into their “active” formation, growing long tentacles to make contact with the vessel and form clusters to plug the wound until it heals.

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Red Blood CellsRed blood cells represent 40%-45% of your blood volume. They are generated from your bone marrow at a rate of four to five billion per hour. They have a lifecycle of about 120 days in the body.PlateletsPlatelets are an amazing part of your blood. Platelets are the smallest of our blood cells and literally look like small plates in their non-active form. Platelets control bleeding. Wherever a wound occurs, the blood vessel will send out a signal. Platelets receive that signal and travel to the area and transform into their “active” formation, growing long tentacles to make contact with the vessel and form clusters to plug the wound until it heals.

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The blood is composed of cells, cell fragments and an aqueous solution (plasma).

Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume percentage of all blood cells in the whole blood is about 45% in adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes etc.).

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Blood is a suspension of blood elements (erythrocytes, leukocytes, and platelets) in blood plasma. Blood elements can be separated from blood plasma using centrifugal force. Figure shows that the most descended are erythrocytes – the volume of erythrocytes in a sample of blood is called the hematocrit. Hematocrit values differ depending on sex – in men the values range about 44 ± 5 % of blood volume and in women about 39 ± 4 % of blood volume. Above the erythrocyte layer is found the white non-transparent layer composed of leukocytes and thrombocytes. This layer is called buffy coat (forms about 1 % of blood volume).In our blood vessels circulate about 4.5-6 l of blood, which represents approximately 6-9% of body weight. Women have less blood than men. Blood plasma, making up the liquid portion of blood, is a colloid solution of organic and inorganic substances (electrolytes, nutrients, proteins, hormones etc.) with an addition of dissolved blood gases. It is slightly opalescent and its pale yellowish colour is caused by the presence of pigments, formed by decay of erythrocytes. Volume of blood plasma is approximately 2.8-3.5 l (40-45 ml/kg of b.w.). Together with the lymph, it makes up to 25 % of extracellular fluid (ECF).

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Blood is a suspension of blood elements (erythrocytes, leukocytes, and platelets) in blood plasma. Blood elements can be separated from blood plasma using centrifugal force. Figure shows that the most descended are erythrocytes – the volume of erythrocytes in a sample of blood is called the hematocrit. Hematocrit values differ depending on sex – in men the values range about 44 ± 5 % of blood volume and in women about 39 ± 4 % of blood volume. Above the erythrocyte layer is found the white non-transparent layer composed of leukocytes and thrombocytes. This layer is called buffy coat (forms about 1 % of blood volume).In our blood vessels circulate about 4.5-6 l of blood, which represents approximately 6-9% of body weight. Women have less blood than men. Blood plasma, making up the liquid portion of blood, is a colloid solution of organic and inorganic substances (electrolytes, nutrients, proteins, hormones etc.) with an addition of dissolved blood gases. It is slightly opalescent and its pale yellowish colour is caused by the presence of pigments, formed by decay of erythrocytes. Volume of blood plasma is approximately 2.8-3.5 l (40-45 ml/kg of b.w.). Together with the lymph, it makes up to 25 % of extracellular fluid (ECF).

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Composition of bloodBlood transports materials and heat around the body, and helps to protect against disease. It contains:plasmared blood cellswhite blood cellsplateletsPlasma is a straw-coloured liquid that makes up just over half the volume of blood.Pie chart showing blood composition: 55% is plasma, and 45% is red blood cells, white blood cells and platelets that float within the plasma.

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Composition of bloodBlood transports materials and heat around the body, and helps to protect against disease. It contains:plasmared blood cellswhite blood cellsplateletsPlasma is a straw-coloured liquid that makes up just over half the volume of blood.Pie chart showing blood composition: 55% is plasma, and 45% is red blood cells, white blood cells and platelets that float within the plasma.

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The blood is composed of cells, cell fragments and an aqueous solution (plasma).Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume percentage of all blood cells in the whole blood is about 45% in adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes etc.).

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The blood is composed of cells, cell fragments and an aqueous solution (plasma).Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume percentage of all blood cells in the whole blood is about 45% in adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes etc.).

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To maintain the aquatic pressure of the blood

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Composition of Blood

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Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrientsand oxygen to the cells and transports metabolic waste products away from those same cells.[ In vertebrates, it is composed of blood cellssuspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume),[2] and contains dissipated proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and blood cells themselves. Albumin is the main protein in plasma, and it functions to regulate the colloidal osmotic pressureof blood. The blood cells are mainly red blood cells(also called RBCs or erythrocytes), white blood cells(also called WBCs or leukocytes) and platelets (also called thrombocytes). The most abundant cells in vertebrate blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates oxygen transport by reversibly binding to this respiratory gas and greatly increasing its solubility in blood. In contrast, carbon dioxide is mostly transported extracellularly as bicarbonate ion transported in plasma.

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Platelets

Platelets are an amazing part of your blood. Platelets are the smallest of our blood cells and literally look like small plates in their non-active form. Platelets control bleeding. Wherever a wound occurs, the blood vessel will send out a signal. Platelets receive that signal and travel to the area and transform into their “active” formation, growing long tentacles to make contact with the vessel and form clusters to plug the wound until it heals.

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Blood,  fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products. Technically, blood is a transport liquid pumped by the heart(or an equivalent structure) to all parts of the body, after which it is returned to the heart to repeat the process. Blood is both a tissue and a fluid. It is a tissue because it is a collection of similar specialized cells that serve particular functions. These cells are suspended in a liquid matrix (plasma), which makes the blood a fluid. If blood flow ceases, death will occur within minutes because of the effects of an unfavourable environment on highly susceptible cells.

The constancy of the composition of the blood is made possible by the circulation, which conveys blood through the organs that regulate the concentrations of its components. In the lungs, blood acquires oxygen and releases carbon dioxide transported from the tissues. The kidneys remove excess water and dissolved waste products. Nutrient substances derived from food reach the bloodstream after absorption by the gastrointestinal tract. Glands of the endocrine systemrelease their secretions into the blood, which transports these hormones to the tissues in which they exert their effects. Many substances are recycled through the blood; for example, ironreleased during the destruction of old red cells is conveyed by the plasma to sites of new red cell production where it is reused. Each of the numerous components of the blood is kept within appropriate concentration limits by an effective regulatory mechanism. In many instances, feedback control systems are operative; thus, a declining level of blood sugar (glucose) leads to accelerated release of glucose into the blood so that a potentially hazardous depletion of glucose does not occur.

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Leukocyte: 3500-10500 per mcL
Erythrocyte: (Men)4.7-6.1 million per mcL
(Women)4.2-5.5 million per mcL

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Composition of blood and its functionsBlood is a suspension of blood elements (erythrocytes, leukocytes, and platelets) in blood plasma. Blood elements can be separated from blood plasma using centrifugal force. Figure shows that the most descended are erythrocytes – the volume of erythrocytes in a sample of blood is called the hematocrit. Hematocrit values differ depending on sex – in men the values range about 44 ± 5 % of blood volume and in women about 39 ± 4 % of blood volume. Above the erythrocyte layer is found the white non-transparent layer composed of leukocytes and thrombocytes. This layer is called buffy coat (forms about 1 % of blood volume).Hematokrit ENG-01In our blood vessels circulate about 4.5-6 l of blood, which represents approximately 6-9% of body weight. Women have less blood than men. Blood plasma, making up the liquid portion of blood, is a colloid solution of organic and inorganic substances (electrolytes, nutrients, proteins, hormones etc.) with an addition of dissolved blood gases. It is slightly opalescent and its pale yellowish colour is caused by the presence of pigments, formed by decay of erythrocytes. Volume of blood plasma is approximately 2.8-3.5 l (40-45 ml/kg of b.w.). Together with the lymph, it makes up to 25 % of extracellular fluid (ECF).

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Composition of blood and its functionsBlood is a suspension of blood elements (erythrocytes, leukocytes, and platelets) in blood plasma. Blood elements can be separated from blood plasma using centrifugal force. Figure shows that the most descended are erythrocytes – the volume of erythrocytes in a sample of blood is called the hematocrit. Hematocrit values differ depending on sex – in men the values range about 44 ± 5 % of blood volume and in women about 39 ± 4 % of blood volume. Above the erythrocyte layer is found the white non-transparent layer composed of leukocytes and thrombocytes. This layer is called buffy coat (forms about 1 % of blood volume).Hematokrit ENG-01In our blood vessels circulate about 4.5-6 l of blood, which represents approximately 6-9% of body weight. Women have less blood than men. Blood plasma, making up the liquid portion of blood, is a colloid solution of organic and inorganic substances (electrolytes, nutrients, proteins, hormones etc.) with an addition of dissolved blood gases. It is slightly opalescent and its pale yellowish colour is caused by the presence of pigments, formed by decay of erythrocytes. Volume of blood plasma is approximately 2.8-3.5 l (40-45 ml/kg of b.w.). Together with the lymph, it makes up to 25 % of extracellular fluid (ECF).

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The blood is composed of cells, cell fragments and an aqueous solution (plasma).

Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume percentage of all blood cells in the whole blood is about 45% in adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes etc.).

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Blood plasma (55%)

Protein - albumin, globulin, fibrinogen

Water

Solutes - electrolyte, waste product, nutrient, gases

Formed Elements (45%)

White Blood Cell

Red Blood Cell

Platelets

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The blood is composed of cells, cell fragments and an aqueous solution (plasma).

Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume percentage of all blood cells in the whole blood is about 45% in adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes etc.).

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Blood transports materials and heat around the body, and helps to protect against disease. It contains:

plasma

red blood cells

white blood cells

platelets

Plasma | Transporting carbon dioxide, digested food, urea, hormones and heat

Red blood cells | Transporting oxygen

White blood cells | Ingesting pathogens and producing antibodies

Platelets | Involved in blood clotting

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It is a type of connective tissue specialized with a matrix colloidal liquid and a complex constitution. It is a solid phase (formed elements), which includes the erythrocytes (or red blood cells), the leukocytes (white blood cells) and platelets, and a liquid phase, represented by blood plasma. These phases are also called blood components, which are divided in serum component (liquid phase) and cellular component (solid phase).

Its main function is the logistics of distribution and systemic integration, whose containment in the blood vessels (vascular space) supports its distribution (blood circulation) to almost the entire body.