Physiology
Textbooks
Boundless Anatomy and Physiology
Introduction to Anatomy and Physiology
Physiology Textbooks Boundless Anatomy and Physiology Introduction to Anatomy and Physiology
Physiology Textbooks Boundless Anatomy and Physiology
Physiology Textbooks
Physiology

Section 2

Life

Book Version 29
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
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3 concepts
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Life Functions

All life forms require certain core elements as well as physical and chemical factors from the ecosystem for biochemical functioning.

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Survival Needs

To sustain human life, certain physiological needs include air, water, food, shelter, sanitation, touch, sleep and personal space.

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Levels of Organization

Living organisms are made up of four levels of organization: cells, tissues, organs, and organ systems.

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