|
|
|
4
|
place where substances are exchanged between the blood and body cells
|
|
7
|
a force exerted by blood against the walls of blood vessels
|
|
8
|
the body's disease fighters
|
|
9
|
a lower chamber of the heart
|
|
11
|
the process by which molecules move from an area of higher concentration to an area of lower concentration
|
|
12
|
the only veins that carry oxygenated blood
|
|
14
|
group of heart cells that sends out signals that make the heart muscle contract
|
|
15
|
Help blood to clot
|
|
16
|
blood vessels that carry blood away from the heart
|
|
19
|
iron-containing protein that binds chemically to oxygen molecules
|
|
|
|
|
|
|
1
|
largest artery in the body
|
|
2
|
hollow, muscular organ that pumps blood throughout the body
|
|
3
|
the alternating expansion and relaxation of the artery walls
|
|
4
|
consists of the heart, blood vessels, and blood
|
|
5
|
the liquid part of blood
|
|
6
|
the second phase of the heart beat
|
|
10
|
an upper chamber of the heart
|
|
13
|
the first phase of the heart beat
|
|
17
|
a flap of tissue that prevents blood from flowing backward
|
|
18
|
blood vessels that carry blood back to the heart
|
|
|
|
