Adults have on average about 2.6kg (5.7lbs) of bone marrow, with about half of it being red. Red marrow is found mainly in the flat bones such as hip bone, breast bone, skull, ribs, vertebrae and shoulder blades, and in the cancellous ("spongy") material at the proximal ends of the long bones femur and humerus.

Where is red bone marrow found in adults quizlet?

In adults, it is primarily found in the flat bones, such as the pelvic girdle or sternum. The red bone marrow contains hematopoietic cells, which are responsible for generating red blood cells.

Why is my bone marrow red?

There are two types of bone marrow: red and yellow. Red bone marrow contains blood stem cells that can become red blood cells, white blood cells, or platelets. Yellow bone marrow is made mostly of fat and contains stem cells that can become cartilage, fat, or bone cells.