TRUE OR FALSE
1. The heart is filled with blood which is squeezed out to circulate through the whole body.
2. After exercise, the heart rate increases and eventually returns to resting pulse.
3. Gas exchange takes place continuously in the bronchioles.
4. Exhaling moves the diaphragm down and expands the chest cavity.
5. The blood delivers carbon dioxide into the right portion of your heart, from which it is pumped to the lungs.
6.Coronary circulation is the movement of blood from the heart to the rest of the body, excluding the lungs.
7. The lung is a hollow muscular organ, about the size of your fist, which is located in the center of your chest between the lungs.
8. Heart rate or pulse is the number of times your heart beats in a minute.
9. Cigarette smoking harms nearly every organ in the body, causing many illnesses and affecting health in general.​