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Human Biology Cells, Organs, and Body Systems Overview Study Guide & Exam Review

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Learn Human Biology with this comprehensive overview of cells, organs, and body systems. Covers cell structure, tissue organization, organ function, and major body systems including cardiovascular, respiratory, digestive, nervous, and endocrine systems. Includes key concepts and practice questions.

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Human Biology: Cells, Organs, and Body Systems Overview
Study online at https://quizlet.com/_joauqv

1. What is the smallest unit of life? Cell

2. What is a tissue? Group of similar cells working togeth-
er

3. What is an organ? Two or more tissues working together

4. What is an organ system? Group of organs with related func-
tions

5. What is homeostasis? Maintaining stable internal condi-
tions

6. What is the normal human body temperature? 37°C or 98.6°F

7. What is the normal body pH? 7.4

8. How many organ systems are in the human 11
body?

9. What does the integumentary system include? Skin, hair, nails

10. What is the main function of the skeletal sys- Support, protection, movement,
tem? blood cell formation

11. What is the main function of the muscular sys- Movement, posture, heat production
tem?

12. What are the two divisions of the nervous sys- CNS and PNS
tem?

13. What makes up the CNS? Brain and spinal cord

14. What is a neuron? A cell that carries nerve impulses

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