Blood is so important to life that the body constantlymakes new blood. 血液对生命十分重要,所以人体会不断的制造新鲜血液。 To do this, the body must produce the liquid part of blood, called plasma, and the cells that floatin it. 人体在造血时必须要产生血液的液体部分,即血浆,以及浮在血浆上...
One amazing fact is that fat cells generally do not generate after puberty -- as your body stores more fat, the number of fat cells remains the same. Each fat cell simply gets bigger! (There are two exceptions: the body might produce more fat cells if an adult gains a significant ...
How does osmosis help to maintain blood volume in the human body? Why would prolonged elevations of blood aldosterone produce hypertension? Describe how the kidney regulates long-term control of blood volume and blood pressure. Name the hormones that increase the blood volume. How does it ...
How do white blood cells attack germs?Immune System:It's amazing to think that our bodies have their own armor of defense. When the human body is exposed to certain threats like a cold, germs or even pollen, our body puts up a great fight. Anything that is not supposed to be in our...
As children, most of our bones produce blood. As we age this gradually diminishes to just the bones of the spine (vertebrae), breastbone (sternum), ribs, pelvis and small parts of the upper arm and leg. Bone marrow that actively produces blood cells is called red marrow, and bone ...
the pièce de résistance: Each antigen has a unique, matching antibody that can latch onto it like a lock and key, and destroy the invading cells. B-cells can produce millions of these, which then cycle through the body and attack the invaders until the worst of the threat is neutralized...
As children, most of our bones produce blood. As we age this gradually diminishes to just the bones of the spine (vertebrae), breastbone (sternum), ribs, pelvis and small parts of the upper arm and leg. Bone marrow that actively produces blood cells is called red marrow, and bone ...
cells, it does a “one for me, one for you” thing in which some of the daughter cells go back to being stem cells, and some of the daughters go on to become mature blood cells. This strategy of continuous self-renewal insures that there will always be blood stem cells in reserve ...
All blood cells are produced in the bone marrow. As children, most of our bones produce blood. As we age this gradually diminishes to just the bones of the spine (vertebrae), breastbone (sternum), ribs, pelvis and small parts of the upper arm and leg. Bone marrow that actively produces...
How does blood coagulate?Blood is an essential fluid that carries out the critical functions of transporting oxygen and nutrients to our cells.Almost 1/10th of a human’s body weight is made up of blood (male +/- 5.5 liters; female +/-4.5 liters). Besides transporting oxygen and ...