where chemicals pass between cells and blood
ventricle
2.
an atmospheric gas expelled by body cells
alveoli
3.
a vessel that carries blood away from the heart
trachea
4.
the liquid that carries chemicals and blood cells through the circulation
platelets
5.
air sacs within the lungs
cells
6.
a lower part of the heart
plasma
7.
any of the arteries, veins or capillaries that carry blood through the body
red blood cells
8.
vessels that carry blood back to the heart
artery
9.
an upper part of the heart
blood vessels
10.
need food and oxygen to live
veins
11.
the thin-walled tube which carries air from the nose and mouth into the lungs
carbon dioxide
12.
the liquid part of blood left over after clotting has taken place
serum
13.
help to stop bleeding
capillaries
14.
carry oxygen to the cells and take carbon dioxide away
white blood cells
15.
help the body fight infection
atrium