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circulatory system
Junior cert science ch5
| Term | Definition |
|---|---|
| who discovered how blood circulates the body | William Harvey |
| functions of blood (5) | to transport OXYGEN to the cells to transport FOOD to the cells to transport WASTE materials away from the cells to help fight INFECTION to regulate body TEMPERATURE |
| what is blood made of | tissue |
| what is a tissue | a group of cells with a similar function and structure |
| what is in blood (4) | plasma red blood cells white blood cells platalets platalets |
| what is plasma | a liquid that the other parts of the blood float in |
| what are red blood cells for | carry oxygen to the cells |
| what are white blood cells for | fight infection and make antibodies |
| what are platelets for | clot blood when blood vessels are damaged |
| what else is carried in plasma | nutrition and heat |
| what is most blood made of | marrow bone |
| 3 types of blood vessels | arteries veins capillaries |
| what do arteries do | carry blood away from the heart |
| what do veins do | carry blood to the heart |
| what do capillaries do | they are very thin and carry blood to cells food and oxygen to cells waste away from cells |
| what do valves in veins do | prevent blood from flowing backwards |
| cardiac | something to do with the heart |
| heart organ name | cardiac muscle |
| how blood goes through the heart | the blood enters the right atrium through the vena cava (top left hand corner) the blood enters the left atrium through the pulmonary vein (top right hand corner) |
| how blood goes through the heart (pt2) | the right and left atrium contract at the same time squeezing blood into the right and left ventracles (bottom half) the ventricles contract, forcing the blood into the aorta (top right middle) and the pulmonary artary (top middle left) |
| septum | muscle up the middle of the heart |