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CIRCULATORY SYSTEM
The circulatory system has two different systems within it.  The cardiovascular system transports blood all around the body. The lymphatic system helps your body defend against illnesses and diseases.

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Part: Cardiovascular System
Structure:
- made up of blood, heart, and blood vessels
Function:
- transport blood all around the body

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Part: Heart
Structure:
- size of fist
- located around the center of your body
Function:
- sends blood all around the body
- left side of heart pumps blood rich with oxygen
- right side of heart pumps blood with a poor amount of oxygen

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Part: Blood
Structure: a type of connective tissue
Function:
- transports hormones, nutrients, and oxygen to cells
- carries waste away from other cells
- part of the cardiovascular system

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Part: Blood Vessels
Structure:
- tube shape
Function:
- how blood travels

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Part: Lymphatic System
Structure:
- group of organs and tissues
Function:
- defends against diseases
- collects fluid that leaks from the blood and returns it

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The Digestive System has two different function that are Mechanical and Chemical digestion. Mechanical digestion are like breaking the food into smaller pieces. Chemical digestion breaking down the food into simpler nutrients that can be used by the cells.

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Part: Lymph
Structure:
- fluid
Function:
- moves in and out of blood vessels
- some move fats from the intestines into the blood

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Part: Lymph nodes
Structure:
- small
- bean shaped
- organs
Function:
- removes pathogens and dead cells from lymph
- white blood cells located in lymph nodes

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Part: Tonsils
Structure:
- small lymphatic organs
- located in back of throat and tongue
Function:
- helps the body defend against infections

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Part: Thymus
Structure:
- organ
- located in the chest
Function:
- gets smaller as a person gets older

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Structure:
-It goes to your mouth and goes down to the end.

Function:
-There are two type of function that helps to break down the food that are Mechanical and Chemical.

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Part: Spleen
Structure:
- largest lymphatic organ
Function:
- stores white blood cells
- allows them to mature

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Mouth
-Mouth breaks downs the food while you are chewing the food.
Esophagus
-The food moves through the throat and into a long tube that is esophagus.
Stomach
- its the muscle bag that crushes food and contains acids and enzymes for killing bacteria and also it breaks down the proteins.
Small intestine
-its a muscular tube where most chemical digestion take places and most nutrients are absorbed.

Large intestine
- A Gut bacteria and dissolved in water are also absorbed in the large intestine and used by the body for metabolism.

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Lymphoma is a type of cancer. Often, it originates in the lymph nodes. It causes a swelling called a tumor. Symptoms include weight loss, fatigue, night sweats, loss of appetite, or shortness of breath

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Heart attacks are a very serious condition. When an artery that is supposed to supply blood to the heart gets blocked, the heart muscle cells get damaged, and they die. If enough of the muscle cells are damaged, the heart could stop beating altogether

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there are  two type of disease that forms inflammatory bowel disease. they are Crohn's disease and ulcerative colitis.
Crohn's disease
- most commonly affects the colon and last small intestine.
Ulcerative Colitis
-it affects the colon.

How does it impact the system:
This impact the system that it makes the immune system attack the lining of the intestine, fever, weight loss, and more.

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1. The heart beats around 3 billion times in a person's lifetime
2. A tiny droplet of blood contains around 5 million red blood cells
3. It takes only 20 seconds for a red blood cell to circulate the entire body
4. Red blood cells make approximately 250,000 round trips of the body before returning to the bone marrow, where they were born, to die.

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1. The stomach has the ability to stretch and hold up to 4 pounds of food at one time.

2. Enzymes in your digestive system are what separate food into the different nutrients that your body needs.

3. Your body can move your food through the digestive system even while you are standing on your head. It is not connected to gravity because it works with muscles.

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The Excretory system eliminates cellular wastes from the body through the lungs, skin, kidneys, and Digestive system.

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The inside of the small intestine has three features that allow it to absorb nutrients efficiently called the Folds, Villi, and Microvilli.

Villis contain blood and lymph vessels that absorb nutrients from food as it passes through the small intestine.

Microvilli increase the surface area of the villi.

folds increase the surface area inside the intestine creating more room for nutrients to get absorbed.

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The large intestine removes water from mostly digested food, absorbed vitamins, and turns food waste into semi solid waste called feces.

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Allows us to breath

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Lungs - Allow us to breath and get oxygen and get rid of carbon dioxide in our system

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The kidney removes waste from the blood.
ureters connects the kidney to the bladder.
The bladder removes urine
Urine exits the bladder through a tube called the urethra.

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Kidney stones:
pink or red urine from kidney stones

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the bladder is around the same weight and size of the brain

In your lifetime, on average, you will produce 7,850,000,000,000 gallons of urine. That's almost 1/12 of Lake Erie.