| A | B |
|---|
| 4 parts of the heart | right atrium, right ventricle, left atrium, left ventricle |
| valves | prevents blood from backing up into upper heart chambers |
| what right ventricle does | pumps blood only a short distance to the lungs |
| what left ventricle does | pumps blood to every part of body |
| what artery does (part 1) | carries blood away from heart; thick muscular walls |
| what artery does (part 2) | pulse produced in an artery |
| what capillary does (part 1) | thin walls, connects arteries to veins |
| what capillary does (part 2) | allow oxygen & carbon dioxide to pass through easily |
| what capillary does (part 3) | red blood cells pass through one at a time |
| what capillary does (part 4) | all cells in body are located near a capillary |
| what veins do (part 1) | carry blood back to heart; thinner walls than arteries |
| what veins do (part 2) | valves keep blood from moving backwards in veins |
| what plasma does (part 1) | liquid portion of blood; 90% water |
| what plasma does (part 2) | where most chemical reactions take place in body |
| what red blood cells do (part 1) | round, doughnut shaped cells with flat centers; 120 day life cycle |
| what red blood cells do (part 2) | thin & numerous; made in bone marrow; no nucleus when mature |
| what red blood cells do (part 3) | contain hemoglobin, transport oxygen, carbon dioxide |
| white blood cells (part 1) | larger, less numerous than red blood cells, contain nucleus |
| white blood cells (part 2) | protect body against invaders (bacteria/viruses) |
| hemoglobin | iron-containing protein; transports oxygen to cells; CO2 to lungs |
| 1 job of circulatory system | deliver oxygen to all cells/keep them alive (energy) |
| 2 job of circulatory system | remove carbon dioxide from cells in body |
| 3 job of circulatory system | transport food to all body cells |
| 4 job of circulatory system | carry wastes away from cells |
| 5 job of circulatory system | supply body with defenses against invaders |
| 6 job of circulatory system | carry chemical messingers |
| platelets (part 1) | colorless fragments of cells; no nucleus |
| platelets (part 2) | many more than white blood cells, less than red; helps blood to clot |
| atherosclerosis | thickening/hardening of arteries due to cholesterol |
| cholesterol | collects on walls of arteries, makes them narrow, causes atherosclerosis |
| hypertension | blood pressure goes up above normal/heart works harder, may leak |
| "silent killer" | hyper tension; no obvious symptoms (high BP) |
| less risk of cardiovascular disease | watch weight, decrease salt intake, eat healthy |
| less risk of cardiovascular disease | exercise regularly, avoid stress, decrease/quit smoking/alcohol |
