1. Which is not a function of the skeletal system?
a. It produces blood.
b. It supports the body.
c. It protects internal organs
d. It protects you from disease-causing microorganisms.
2. Which system in the human body works together with the circulatory system to ensure
that the right gases are circulated around the body?
a digestive system
c. respiratory system
b. muscular system
d. skeletal system
3. What blood cells transport oxygen and carbon dioxide?
a White blood cells
c. platelets
b. Red blood cells
d. plasma​