Translations:Adventist Youth Honors Answer Book/Health and Science/Heart and Circulation/1/en
From Pathfinder Wiki
1. Describe the basic function of the following parts of the circulatory system: heart, blood vessels, blood, and lungs.
- Heart
- The heart is a muscular organ responsible for pumping blood through the blood vessels.
- Blood Vessels
- The blood vessels are like tubes inside the body though which blood flows. They function to transport blood throughout the body.
- Blood
- Blood is a specialized fluid consisting of red blood cells, white blood cells, and platelets suspended in a complex fluid medium known as blood plasma. Blood plasma is the liquid component of blood, in which the blood cells are suspended. It makes up a little more than half of total blood volume. By far the most abundant cells in blood are red blood cells. Red blood cells carry oxygen to all the other cells in the body and carry carbon dioxide (and other wastes) away from them. White blood cells help to resist infections, and platelets are important in the clotting of blood.
- Lungs
- The principal function of the lungs is to transport oxygen from the atmosphere into the bloodstream, and to get rid of carbon dioxide from the bloodstream into the atmosphere.
