identify the body systems working together in the following situations.choose from the given pairs inside the box.write the letter of the answer on the blank.
1. You realize that its cold in the room.
2. Oxygen is delivered to the cells of your body.
3. Food nutrients are supplied to the cells of your body.
4. You open your mouth to sepak
5. Undigested food is discharged from the body.
6. Red blood cells are produced in the red bone marrow.
7. The skin protects the underlying muscles.
8. The muscles are attached to the bones
9. The heart beats faster when the brain detects danger.
10. The rib cage protects the lungs.​