SCIENCE CHAPTER 3 STUDY GUIDE
– HUMAN BODY SYSTEMS
VOCABULARY
1. The tube between the larynx and the bronchi is the ____________________.
2. The parts in the lungs where oxygen enters the bloodstream are
____________________.
3. The respiratory system cleans the air you breathe with a coating of sticky fluid called
____________________.
4. A(n) ____________________ keeps blood from flowing backward.
5. A(n) ____________________ carries blood from the heart to the smallest blood vessels, one of which is called an ____________________.
6. Blood is carried by a(n) ____________________ toward the heart.
7. Ringed muscles of the ____________________ push food to the stomach.
8. Tubes that carry air inside the lungs are ____________________.
LABS
9. What is the muscle below the lungs that contracts when you inhale?
____________________.
10. Put these in order along the path the blood takes:
___ Right ventricle ___ Left atrium
___ Lungs
1 From the body
___ Out to the body
___ Right atrium
___ Left ventricle
11. What are four components of blood? (think blood soup)
____________________ ____________________
____________________ ____________________

TRUE OR FALSE
T F 12. Blue blood cells carry oxygen to the rest of the body.
T F 13. Chewing is the first step of digestion.
T F 14. Helpful bacteria live in the large intestine.
T F 15. All multicellular organisms need carbon dioxide for their cells to get the energy they need.
T F 16. Tiny hairlike structures on cells in linings of many parts of the respiratory system are called cilia.
CHOOSE THE BEST ANSWER
17. What is the kidney? a. an organ that cleans the blood b. a structure that keeps blood flowing through the heart c. the place where carbon dioxide leaves the bloodstream d. an organ where food is stored
18. What structures connect the smallest arteries to the smallest veins? a. air sacs b. capillaries c. bronchial tubes d. valves
19. Which of these systems does NOT carry waste out of the body? a. circulatory b. respiratory c. digestive d. urinary
20. Which of the following will the body make in greater numbers in response to an infection? a. plasma b. platelets c. red blood cells d. white blood cells

21. What is the role of villi in the small intestine? a. The villi contract to break down food. b. The villi make vitamins the body uses c. The villi provide more surface area to absorb food. d. The villi release chemicals to aid in digestion.
22-25. Use the diagram below to label the chambers of the heart.
26-30. Put these parts of the respiratory system in order as air is inhaled. bronchial tubes bronchi trachea air sacs larynx nose