gas exchange in plants and animals

Question 1

the uptakeof molecular O2 from the environment and the discharge of CO2 to the environment in animals and vice versa in plants.

Answer 1

gas exchange/respiratory exchange/respiration

Question 2

outfoldings of the body surface that are suspended in the water, often have a total surface area much greater than that of the rest of the
body’s exterior.

Answer 2

gills

Question 3

made up of air tubes that branch throughout the body, this system is one variation on the theme of an internal respiratory surface

Answer 3

tracheal system

Question 4

localized respiratory organs that is represented by an infolding of the body surface, they are typically subdivided into numerous pockets.

Answer 4

lungs