https://padlet.com/hglenville/ogugzrg1ahipgj99 en-us 2022-03-07 15:02:34 UTC 2022-11-30 03:35:36 UTC hello@padlet.com dompecak https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400806406 A small compact cell, released during sexual intercourse and their main function is to eventually meet with and fertilize an ovum.

The sperm cell is made up of a "head" and a long tail. The almond-shaped head helps to penetrate the membrane of the ovum. The tail moves with whip-like movements to propel the cell forward.

In most male mammals, including humans, sperm is produced continuously and released at ejaculation.

The sperm is optimized to propagate the paternal genes; it is capable of reaching high speeds so that it can fertilize an egg before it DIES. If it does not fertilize an egg in time it DIES.]]> 2022-11-28 19:30:39 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400806406 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400820516 - Found in animal cells
- Function - Their major function is to control the diameter, wall movement, and wall stiffness of hollow organs like the vascular, bronchial, gastrointestinal or urogenital system. They are found in the liver, pancreas, and intestines.
-The smooth muscle cell is  control of external stimuli released from autonomous nerves, adjacent cells or distant sites.
- The smooth muscle cell is elastic, not striated, spindle-shaped and contain a single central nucleus.
- Smooth muscle cells are arranged together in sheets and this organisation means that they can contract simultaneously]]> 2022-11-28 19:41:04 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400820516 zren5 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400822363 Animal Cells
White blood cells are a part of the body's immune system. Their job is to help fight infection and other diseases.

Type of white blood cells
- granulocytes 
- neutrophils, 
- eosinophils
- basophils
- monocytes
 - lymphocytes 

White blood cells carry out their defense activities by ingesting foreign materials and cellular debris, by destroying infectious agents and cancer cells, or by producing antibodies.]]> 2022-11-28 19:42:26 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400822363 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400844237 - only found in animal cells
- carries signals and messages to perform tasks

Features:
- somas
     - contains the nucleus
- dendrites
     - where inputs occur
- axons
     - carries nerve signals
- axon terminals
- contains synaptic]]> 2022-11-28 19:58:12 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400844237 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400844896 - A type of blood cell made in bone marrow and found in the blood and lymph tissues.
- Found in animal cells
- Function: They're function is to help the body fight infection and other diseases.
- They protect from diseases by ingesting foreign materials and cellular debris; by destroying infectious agents and cancer cells; or by producing antibodies
- Lacks hemoglobin, has a nucleus to produce protein, is capable of motility
- Make up a majority of the cells in the immune system

]]> 2022-11-28 19:58:42 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400844896 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400846027 it is a type of body tissue that forms the covering on all internal and external surfaces of your body, lines body cavities and hollow organs and is the major tissue in glands.

Function: Epithelial tissue protects several aspects of your body

Epithelium, endothelium and mesothelium are three types of epithelial cell.



]]> 2022-11-28 19:59:28 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400846027 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400851572 Nerve cells(neurons)

Nerve cells (neurones) are the link of communication through the nervous cells using synapses. They signal and communicate to other cells, they are basically the information messanger of the body.

Each nerve cell contains the cell body.(A  major branching fiber) and other small fibers. The neuron is a main component of nervous tissue in all animals with the exception of sponges and placozoa. 

There are 3 types of neurons. 
Sensory neurons=touch and stimuli
Motor neurons=receive brain signals
Interneurons= connect neurons 


]]> 2022-11-28 20:03:30 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400851572 cduldhardt https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400853546 The bone cells work together to make up the bone a vital part of the body. The bone is vital for protecting organs creating the ridged frame and soring minerals. The Osteogenic cell is the stem cell of the cells. The Osteoblast helps form bone matrix. The Osteoclasts resorbs the bone and the Osteocyte maintains the bone tissue. ]]> 2022-11-28 20:04:59 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400853546 fayealqadhi https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400856009 Nerve cells (Neurons) are a type of cell found in nervous tissue in the brain, spinal cord, and nerves. They can transduce a variety of stimuli into electrical signals to the central nervous system making them responsible for coordinating and controlling many body activities. They are only found in animal cells and consist of the cell body otherwise known as the soma, a major branching fiber called the axon, and numerous smaller branching fibers called dendrites. The cell body contains the nucleus and maintains the cell's structure, provides energy, and contains genetic information. Dentrites help the cell receive inputs from the axons. The axon is where electrical impulses from the neuron travel away to be received by other neurons. ]]> 2022-11-28 20:06:54 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400856009 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400860640 Phloem is a plant cell which transports carbohydrates from sources to sinks through the sieve elements. It is composed of 3 cell types; sieve elements (transports organic compounds made during photosynthesis), parenchyma (stores food), sclerenchyma (provides flexible tensile strength to phloem tissue).]]> 2022-11-28 20:10:31 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400860640 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400868368 Keratinocytes are the most common type of skin cell, and are found in many different animals. These cells help protect their host by being a barrier against invading organisms, harmful chemicals, and UV radiation from the sun. They also minimize the amount of water and heat lost through a person's skin.

The keratinocytes originate in the deepest layer of the skin, before being pushed up through the skin layers by the formation of new cells. Eventually, the skin cells flatten and die, as they are too far from any blood vessels bringing them nutrients.

]]> 2022-11-28 20:16:57 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400868368 https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400921906 Adipose (fat) cells are specialized for the storage of energy in the form of Triglycerides, cholesterol and other essential fatty acids, it also store energy, insulate us and protect our vital organs. but research in the last few decades has shown that fat cells also play a critical role in sensing and responding to changes in systemic energy balance.

It is in both plant and animal cell

White fat cells secrete important hormone-like molecules such as leptin, adiponectin, and adipsin to influence processes such as food intake, insulin sensitivity, and insulin secretion.


]]> 2022-11-28 21:07:21 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2400921906 halaalshrbini https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2402953827 Neutrophils are (the most common) white blood cells, a vital part of the immune system. 

They are only animal cells not plant cells. Neutrophils are also transmigratory cells and thus, can slip through blood vessel walls to reach enemies (pathogens). They have a multi-lobed nucleus (and when matured, no nucleoli) connected by thin chromatin filaments

Neutrophils are "born" within the bone marrow (premature white blood cells are called myelocytes). They make up 70% of white blood cells (leukocytes) and are the primary defence against any invading pathogens. They destroy pathogens by phagocytosis or releasing pathogen-fatal enzymes.

Neutrophils also mediate inflammation and boost the other immune cells' responses.

They have a flexible shape (partly due to lack of cell wall) and can change into an amoeboid. This allows for neutrophils to extend their shape to attack invaders (eg. to perform phagocytosis). Within the cytoplasm, there are azurophilic [ie. microbicidal] granules. When a neutrophil consumes an invading pathogen, it's then neutralized by these anti-bacterial granules, preventing it from hijacking/harming the neutrophil. ]]> 2022-11-30 03:35:36 UTC https://padlet.com/hglenville/ogugzrg1ahipgj99/wish/2402953827