By:Claire H. Kiara S.and Jordan B.
The spleen is an organ found in almost all vertebrate animals. The spleen acts primarily as a blood filter. Life is indeed possible after the spleen is removed. Although people can live without a spleen, its absence can result in overwhelming bacterial infections if proper precautions are not taken. The spleen plays an important role in regard to red blood cells and the immune system. It remover old red blood cells and also recycles iron. In human and the spleen is brownish in colour and is located in the upper left portion of the abdomen. Infections that can affect the spleen are hepatitis,malaria, and brucellosis (rare bacterial, infection caused by ingestion of unsafe meat of milk).
Fast fact: Some people are born without a spleen and never no.
Fast fact: Plasma carries red and white blood cells
Capillaries are thin and fragile. Capillaries are so thin that they are only one epithelial cell thick, and they are also so thin that the only way blood cells can go pass them is in a single file. Capillaries are also the smallest blood vessels. The capillary walls are so thin that they allow water, oxygen. carbon dioxide and other nutrients easily into your body.
Fast fact: the smallest capillaries are in the brain and intestines
The arteries are the blood vessels that gives oxygen blood to the tissues. Each artery is muscular tube lined by tissue. Your body is also like a highway , and the roads are arteries and veins. Pulmonary arteries carry blood from heart to the lungs where blood picks up oxygen. Systemic arteries give blood to the body. Did u know that the smallest artery is called the arterioles?
Fast fact: the main artery is called dorsal aorta.
Veins are not as strong as arteries. Inside veins are flaps that let blood flow to go in one direction. Veins must be able to not let blood to start backing up. Veins must be able to allow blood to get together without bursting. Veins have valves to prevent blood to go backwards. Veins have less muscle and tissue than arteries they don’t always keep their tube shape and they could appear flattened. Varicose veins lead to stress or aching of the part where they are.
Fast fact: The walls of the veins are really thin and the rich blood is visible through the skin.
Fast fact : Daily, the heart creates enough energy to make a truck drive 20 miles !