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What Is Returned to the Heart Via Several Major Veins

question 33

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What is returned to the heart via several major veins?


Definitions:

Adenylyl Cyclase

An enzyme that converts ATP to cyclic AMP, playing a critical role in cell signaling pathways.

Endocrine

Pertains to the system of glands that release hormones directly into the bloodstream to regulate body functions.

Chemical Secreted into Blood

Substances released by cells or glands into the bloodstream to act on distant target organs or tissues.

Specialized Cells

Cells that have developed distinct characteristics and functions, adapted to perform a specific role within an organism.

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