A) Part of gas-exchange system, exchange both \[C{{O}_{2}}\] and \[{{O}_{2}};\] increase surface area for diffusion.
B) Used by water breathers; based on countercurrent exchange; use negative pressure breathing.
C) Exchange only \[{{O}_{2}};\] are associated with a circulatory system; found in vertebrates.
D) Found in insects; employ positive-pressure pumping based on crosscurrent flow.
Correct Answer: A
Solution :
[a] The external gill, tracheae, and lungs are all examples of gas-exchange systems used by various animals to exchange both \[C{{O}_{2}}\] and \[{{O}_{2}}.\] One of the special properties of all respiratory systems is that they increase surface area for diffusion.
You need to login to perform this action.
You will be redirected in
3 sec
