Body parts Comprehension.

1. The oxygen enters our lungs and is carried around to all the body’s cells by the circulatory system.

2. Did you know that your body has  every gas exchange program that runs 24 hours a day.

3. Gas exchange of oxygen and carbon dioxide takes place in the alveoli. Oxygen from the inhaled air diffuses through the walls of the alveoli and adjacent capillaries into the red blood cells. The oxygen is then carried by the blood to the body tissues.

4. Carbon dioxide travels out of your body when you exhale.

5. Your body has a special way of making sure that you can get the amount of oxygen that you need when you breath.

1. White blood cells also called leukocytes, are an important part of the immune system. These cells help fight infections by attacking bacteria, viruses, and germs that invade the body. White blood cells originate in the bone marrow, but circulate throughout the bloodstream.

2. Arteries, Veins, and Capillaries. The blood from the heart is carried through the body by a complex network of blood vessels . Arteries take blood away from the heart. The main artery is the aorta that branches into other major arteries, which take blood to different limbs and organs.

3. Gas Exchange across the Alveoli. In the human body, oxygen is used by cells of the body's tissues to produce ATP, while carbon dioxide is produced as a waste product. The ratio of carbon dioxide production oxygen consumption is referred to as the respiratory quotient (RQ), which typically varies between 0.7 and 1.0.

4. The main idea is that all of our body parts are very important and we must look after them at all times.

5. Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs. Hemoglobin is made up of four protein molecules (globulin chains) that are connected together.