If you face a dangerous situation, the breathing rate .........................

When your heartbeats and breathing rate increase, your body sends more ..................... blood to the muscles, brain, and other organs to face the danger

If the diaphragm contracts, the size of the chest ................., and ................ enters the lungs

..................... and .................... can't pass through kidneys' nephrons

The endocrine system consists of ................... that secrete ....................

...................... transports the nutrients, gases, and hormones to all body cells

The ................. allow the movement of the bones of the skeletal system

If the heartbeats increase , the blood pressure ........................

The organ that absorbs most of water from the undigested food is ..............

The digestion process starts in ...............................