bone marrow <span>contains hematopoietic stem cells, which give rise to the three classes of blood cells that are found in the circulation: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes)</span>
A,C,D,B that the order i would put them in
The food groups are arranged on the pyramid according to the number of servings required from each to construct a healthy diet. For example, the largest number of servings each day should come from the bottom level, the bread or grain group.
In the lungs, oxygen is put into the blood and carbon dioxide is taken out of the blood during the process of breathing. After the blood gets oxygen in the lungs, it is called oxygen-rich blood.
Malnutrition, I’m pretty sure.
