EXCHANGE SURFACES Flashcards
1
Q
name some common exchange surfaces in animals and plants
A
gaseous exchange between blood and alveoli
stomata for exchange of oxygen and carbon dioxide
root hair cells - exchange water and mineral ions
nutrient exchange between villi in the small intestine and blood
2
Q
why do multicellular organisms need a transport system
A
get rid of waste products (respiration)
supply of oxygen and nutritents
has two layers
3
Q
A
4
Q
what do the alveolus have that makes them good for gas exchange
A
large surface area - for large gas exchange
moist lining - easier dissolving of gases and evaporation
surfactant coat - produced by lungs to lower surface tension and prevent alveoli from collapsing
5
Q
A
