for our body, it is in the bone marrow
Blood does not produce anything. Red blood cells and white blood cells are produced in the marrow of bones. Blood then supplies oxygen and hormones to the body to insure the body works properly. Blood cells are bathed in plasma.
The Immune System
the circulatory system does not "produce" blood cells. The circulatory system does not produce anything, it just circulates the blood around your body.
When the body needs a specific type of blood cell, the bone marrow uses its stockpile of stem cells to produce the kind of mature cells needed
Blood cells are produced in red bone marrow by a process called hematopoiesis. Every cell in the body gets its nutrients from blood.
You have red bone marrow in your bones. That produces red blood cells in your body.
2 things:Cells need blood and oxygen to produce.
You have more red blood cells in your body than white because white blood cells only tend to produce when your body is under pressure by pressure I mean an illness . Plus for each tiny drop of blood we have there are over 5 million red blood cells in side :)
Dendritic cells
An infection could cause your body to produce more bacteria fighting white cells.
Your body might develop 75 cells while you are as an embryo. People have billions-trillions cells.
Bone cells help you stand up and move. As well as helping your body produce red blood cells.