| A | B |
|---|
| functions of the cardiovascular system | carries needed substances to cells, carries waste products away from cells, fights disease |
| structure of the heart | right atrium, right ventricle, left atrium, left ventricle |
| blood's path | loop one- to lungs and back to heart; loop 2: to the body and back to the heart |
| cardiovascular system-also know as | circulatory system |
| parts of cardiovascular system | heart, blood, arteries, capillaries, veins |
| heart | hollow, muscular organ that pumps blood |
| how large is the heart? | about the size of your fist |
| where is the heart? | slightly left of the center of your chest |
| what protects the heart? | sternum (breastbone) and ribcage |
| septum | wall of tissue separating the left and right sides of the heart |
| how many chambers does the human heart have? | four |
| atria | upper chambers of the heart |
| ventricles | lower chambers of the heart |
| valve | flap of tissue that prevents blood from flowing backward |
| lub-dub | sound of a heartbeat |
| pacemaker | group of heart cells that tell the heart how fast to beat |
| arteries | blood vessels that carry blood AWAY from the heart |
| capillaries | tiny blood vessels that exchange substances with individual cells |
| veins | blood vessels that carry blood back toward the heart |
| pulmonary loop | blood flows from the heart, to the lungs, and back to the heart |
| systemic loop | blood flows from the heart, to all parts of the body, and back to the heart |
| aorta | largest artery in the body; comes off the heart |
| three types of blood vessels | arteries, capillaries, veins |
| pulmonary | lungs |
