Examlex
Sections along each chromosome,known as ____________________,control the chemical reactions that direct development.
genes
Atmospheric Air
The mixture of gases surrounding the earth, primarily composed of nitrogen, oxygen, argon, carbon dioxide, and trace gases.
Water Vapor
The gaseous phase of water, forming clouds and contributing to the greenhouse effect.
Pulmonary Capillaries
Tiny blood vessels in the lungs where gas exchange occurs, allowing for the uptake of oxygen and the release of carbon dioxide.
Left Atrium
One of the four chambers of the heart, receiving oxygenated blood from the lungs and pumping it into the left ventricle.
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