CELL STRUCTURE

DNA:  the genes are found in the chromosomes that make up the DNA

BLOOD CELLS

RED BLOOD CELLS (eurythrocytes): carry oxygen from the lungs to the organs of the body

PLATELETS:  group together for the blood to clot

WHITE BLOOD CELLS:  fight infection in the body and there are many different types

PLASMA:  the liquid in the blood vessel

All blood cells are produced in the bone marrow from stem cells (immature cells) and the bone marrow is found in the bones of the body (skeleton)

LYMPHATIC SYSTEM

The lymphatic system is similar to the network of blood vessels, but they carry lymph fluid which passes through lymph nodes (glands). The main function of the lymphatic system is to fight off infection in the body.