Oxygen and carbon dioxide travels to and from tiny air sacs in the lungs, through the walls of the capillaries, into the blood. Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs.

<u><em>Rodhocetus is an extinct genus of protocetid early whale.</em></u>
Answer:
Homeostasis is the process of maintaining a constant internal environment suitable sustaining life.
Answer:
joints there are more than this
Explanation:
the hormones help your body functions from metabolism to growth and development