Because is where it has to stay. To make the blood continue.
because it can flow also blood in these blood vessels or the stay there if the cells need oxygen
Why do you think that the blood cells stay in the blood vessels
Red blood cells are too small to contain blood vessels. They are cells and they travel in blood vessels.
The only blood cells that function entirely within the blood vessels are red blood cells.
You will find plasma, white cells and platelets with red blood cells.
Red blood cells travel in a liquid called plasma found in the blood vessels.
Nothing as erythrocytes (i.e. red blood cells) are never"pumped into cells". They stay inside the blood vessels, circulating around and around.
Inside red blood cells is packed hemoglobin and not much else.
Hemoglobin.
Blood doesn't flow through blood vessels, there are blood vessels in your blood known as red blood cells and white blood cells. The red blood cells carry oxygen and the white help fight diseases.Your blood flows through a system of artries and viens.
white and red blood cells
haemoglobin.