The skeleton give structure to the body as well as protects organs and parts of it make red blood cells, platelets and white blood cells.
The Answer Is Circulatory System That Makes Blood Cells RED ! it is the heme part of the haemoglobin that gives blood cells their bright red colour.
The heme group of the oxygen binding hemoglobin gives blood it's red color.
Oxygen is the gas transported by red blood cells that gives them a bright red color.
antigen
Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells of most vertebrates and some invertebrates. In mammals, the protein makes up about 97% of the red blood cells' dry content, and around 35% of the total content (including water) and gives them the red colour typically seen in blood.
Bone marrow makes blood cells
blood cells
Blood cells are made in the spleen and in the bone marrow.
Plant cells are surrounded by a stiff cell wall made of cellulose, which makes the cells very rigid. It is this strong structure that gives plants their sturdiness.
The iron in your blood
No red blood cells are formed in bone marrow
A group of cells make up a tissue.