platelets
Blood cells are a part of blood. Blood is not a part of blood cells. Blood can't flow backward and forward within blood cells. Blood cells can flow backward and forward within blood.
Materials needed by the cells move from the blood into the cells, and waste materials move from the cells into the blood.
I think you're thinking of vit K. It does not stop blood flow, but a lack of it will prevent clotting.
it makes the blood into clots
white blood cells(wbc)
flow cytometry
Histamine is the chemical produced by white blood cells that increase blood flow to an injured area. It causes blood vessels to dilate, which allows more blood to flow to the affected area to deliver immune cells and nutrients for healing.
blood doesn't 'flow backwards - there are valves in the veins and arteries to stop that happening. Oxygenated blood is sent from the lungs, via the heart - to all parts of the body. When the oxygen has been used up by the cells, the blood returns to the hart through the veins.
The flow of blood and tissue cells from the uterus is called menstruation. During menstruation, the lining of the uterus sheds and is expelled through the vagina. This process is accompanied by the flow of blood, which is a mix of tissue cells, uterine lining, and blood from the ruptured blood vessels in the uterus.
Red Blood Cells- make the blood red; and carry the oxygen White Blood Cells- fight infections Platelets- form clots to stop the flow of blood Plasma- a yellowish liquid that carries the nutrients
because it can flow also blood in these blood vessels or the stay there if the cells need oxygen
To open and close to allow the flow of blood and to stop the flow of blood.