8. Which organ system carries oxygen to the cells of the body?
A. Respiratory system B. circulatory system
C. digestive system
9. White blood cells help protect the body from illness by engulfing disease-causing organisms. Which or
D. excretory
produces white blood cells?
A. Immune system
B. integumentary system C. digestive system D. circu
10. What is formed by a group of cells and tissues that work together to carry out a specific function?
A. Organs
B. organelle
C. organ system D. organism
11. One organ system includes the kidneys, bladder, and urethra. What is the purpose this system?
A. To remove waste from the body
C. To transport materials to the cells
B. To produce offspring
D. To protect the body from disease.
12. Which organ system in humans makes sperm cells?
A. Male reproductive system
C. digestive system
B. Circulatory system
D. female reproductive system
13. Which structure is the simplest level of organization in humans?
A. Organs B. organ system
C. cell
D. tissue
14. Which of these organ systems controls and coordinates most body functions?
A. Excretory system B. digestive system C. nervous system D. reproductive sys
15. Which pair of organ systems work together to fight viral diseases such as the flu?
A. Digestive and reproductive
C. immune and excretory
B. Respiratory and nervous
D. circulatory and immune
16. Which of the following cell processes DOES NOT depend on nutrients?
A. Making needed materials C. All of these
B. Response to stimuli
D. None of these
17. What system allows an organism to respond quickly to changes in the internal or external er
C. nervous system D. circu
B. respiratory system
A. Excretory system
18. Digestive system, integumentary system, respiratory system are examples of
D. organism
A. Cells
C. organs system
B. organs
19. The basic unit of structure and function in all living things is called
C. Organ D. Organ System
A. Cells
B. Tissue
20. A group of similar cells that perform the same function is called
C. tissue D. organelles
A. Organ
B. organ system​