How Did the Emergence of Photosynthetic Organisms Alter Earth's Early

question 50

Essay

How did the emergence of photosynthetic organisms alter Earth's early atmosphere? How did this change influence the evolution of life on Earth?

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Definitions:

Elastic Arteries

Large arteries that contain elastic tissue in their walls, enabling them to stretch and recoil for blood flow regulation.

Precapillary Sphincter

A band of smooth muscle that regulates blood flow into the capillaries, largely controlling the microcirculation.

Action Potentials

Electrical impulses that travel along the membrane of a nerve or muscle fiber, initiating activity or movement.

Coronary Sinus

Short trunk that receives most of the veins of the heart and empties into the right atrium.