a) to take in oxygen
b) to control the body
c) to digests food
a) the brain
b) the lungs
c) the skeleton
a) the heart
b)the lungs
c) the stomach
a) the brain
b) the heart
c) the lungs
a) the brain
b)the heart
c) the lungs
a) the brain
b) the heart
c) the lungs
a) your lungs take oxygen from air
b) your stomach takes oxygen from air
c) Your brain takes oxygen from air
a) food moves from the stomach to the esophagus
b) air moves from the esophagus to the stomach
c) food moves from the esophagus to the stomach
c) food moves from the esophagus to the stomach
a) it tells your other body parts what to do
b) it digests food
c) it pumps blood
a) she feels thirsty
b) she measures her heart rate before and after she exercises
c) she knows exercise is good for her
a) you predict that your heart rate changes when you exercise
b) you feel tired after you exercise
c) you measure your heart rate before and after you exercise
c) you measure your heart rate before and after you exercise
a) They help you breathe
b) they help you move
c) they help you digests food
a) the heart
b) the lungs
c) the muscles