1. The Structure and Function of Body Systems Vocabulary of Instruction:
7th Grade
Unit 5:
The Structure and Function of Body Systems
Lesson 3:
Respiratory and Circulatory Systems, and Flow of Blood
Vocabulary of Instruction:

2. Alveoli
Tiny sacs of lung tissue specialized for the movement of gases between the air and the blood.

3. Arterioles
The smallest divisions of the arteries located between the muscular arteries and the capillaries.

4. Capillaries
Tiny little venules or vessels between the arteries which carry blood from the heart and veins back to the heart.

5. Diaphragm
A large, dome-shaped muscle that has an important function in breathing.

6. Hemoglobin
Substance in red blood cells which conveys oxygen from the lungs to body tissues.

7. Platelets
Tiny membrane-bound cell-like particles found in blood that carry materials important for the formation of clots.

8. Trachea
The windpipe of the respiratory system.

9. Venules
The minute vessels that collect blood from the capillary plexuses and join together to form veins.

10. The Whole Picture