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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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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