How many of the labeled structures are part of the axial skeleton? skeleton.png

What is the function of this system? lung.jpg

Which of the following have a single circuit blood flow? rep-amp-mam-fish(1).png

Refer to the figure above. Which of these lungs would be best for an animal that is fairly active? lung lec exam 5.jpg

The four-chambered heart first evolved among the:

The exchange of gases between an organism and its environment is known as:

How do terrestrial animals prevent toxic accumulation of ammonia in their tissues?

Refer to the accompanying figure. The function of the structure labeled as 14 is to: heart lec exam 5.jpg

T/F:  Gases move freely across the walls of the bronchioles into the capillaries that surround them.

The process by which the nuclei of sperm and egg fuse to form the zygote: