List the Three Primary Variable Gases and Their Respective Percentages

question 65

Essay

List the three primary variable gases and their respective percentages of the atmosphere. Why are they important?

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Definitions:

Internal Transportation

The movement or transfer of substances, energy, or information within an organism or physical system.

Metarterioles

Small blood vessels that directly link arterioles with veinules.

Arterioles

Small branches of arteries that lead into the capillaries and regulate blood flow and pressure through the constriction and dilation of their walls.

Venules

Small veins that allow blood to return from the capillary beds to the larger blood veins.