unit 3; Gas exchange in single-celled organisms and insects

Question 1

define tracheae

Answer 1

internal network of tubes in insects supported by strengthened rings

Question 2

define tracheoles

Answer 2

dead ended tubes branching off tracheas- extending through all body tissues allowing for short diffusion pathway

Question 3

3 ways respiratory gases move through tracheal systems

Answer 3

along a diffusion gradient, mass transport, osmosis- ends of tracheoles are filled with water

Question 4

define spiracles

Answer 4

tiny pores on surface where gases enter and leave- can open and closes via valves