Biology - The circulation System

Biology : The Circulation System
funtction
food & oxygen to every cell
waste products
carbin dioxide
urea
Double Circulation System
mammals and birds
1/ heart
two pumps
right side
deoxygenated blood to lungs
cellect oxygen
remove carbon dioxide
left side
oxygenated blood round body
2/ Arteries
blood
away from heart
high pressure
oxygenated blood
aorta
artery out of heart
3/ Pulmonary
artery
deoxygenated blood to lungs
vien
oxygenated blood from lungs
NB reverse to normal artery / vien roll
4/ capillaries
split form arteries
carry blood to every cell
diffusion
food & oxygen to body tissue
carbon dioxide and waste materials away
walls one cell thick
microscope needed to see them
5/ veins
collect used blood
back to heart
low pressure
vena cava
vein into heart
single ciculation system
fish
blood
straight from
heart - gills (lungs) - rest of body
other circulation systems
worms
5 pairs of hearts
flatworms
no circulation system
Arteries, Veins, Capillaries