6. Which body system is responsible for
breathing?
A. Digestive system
B. Urinary system
C. Circulatory system
D. Respiratory system

7. Our body has defense mechanism that protect itself from foreign bodies. Which of the following fights against
infection and disease?
A. Vitamins B. Skin
C. Red blood cells
D. White blood cells

8. The circulatory is composed of red blood cells, white blood cells, platelets and plasma. Which of the following is the
primary function of red blood cells?
A. allow reproduction
B. remove waste
C. transport oxygen
D. fight disease

9. The system of the human body work together. Which system works with the skeletal system by pulling on the bones
to create movement?
A. Circulatory
B. Nervous
C. Muscular
D. Digestive

10. Teeth are part of the skeletal system, but they are also part of the digestive system. What role do teeth play in the digestive system?
A. They begin mechanical digestion.
B. They release enzymes into the saliva for chemical digestion.
C. They begin chemical digestion.
D. They are shaped for grinding, mashing, and tearing food

Pa answer po thx, ​