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Atherosclerosis ____.​

O2 is transported from air in the lungs into the blood through the process of ____.​

Freshwater flatworms have this type of system for osmoregulation.

The “QRS” complex visible in a normal electrocardiogram is associated with the

An increase of _____ increases the permeability of the collecting duct to water.

Living at high altitudes can cause ____ as a respiratory adaptation.​

The ____ changes during exercise.​

How do endotherms and ectotherms derive most of their body heat?

The ____ carries oxygenated blood.​

The primary route for ion loss from the body is the ________ system.