AP BIOLOGY

Detailed explanation-1: -Giraffes breathe in oxygen and release carbon dioxide just like humans and other mammals do.

Detailed explanation-2: -Oxygenated air, taken in during inhalation, diffuses across the surface of the lungs into the bloodstream, and carbon dioxide diffuses from the blood into the lungs and expelled during exhalation.

Detailed explanation-3: -In animals, oxygen combines with food in the cells to produce energy for daily activity and then gives off carbon. The carbon combines with oxygen to form carbon dioxide (CO2) and is released back into the atmosphere as a waste product when animals breathe and exhale.

Detailed explanation-4: -A giraffe’s heart is 2 feet long and weighs about 25 pounds. And a giraffe’s lungs can hold 12 gallons of air.

Detailed explanation-5: -They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.