Red blood cells are made in the red bone marrow.
When red blood cells die, other red blood cells come in and multiply.
The darker blood is older blood while the red is newer.
Both red and white blood cells come from blood stem cells in the bone marrow.
Blood?
Very pale pink to dark blood red.
blood(I guess)
Maybe,maybe not
blood maybe Edit: Most red and white blood cells come from the bone marrow and then travel in the blood through the veins.
Not all the blood components. The red blood cells are made in the bone marrow.
a dolphins blood is somewhat like humans but their blood starts out red and come out red
it is just a darker older blood that has not come out fresh like the red blood... it is nornmal
A lack of nuclei allows the red blood cell to contain more hemoglobin, which transports oxygen. It also allows the red blood cells to squeeze through tight spots as they travel the body