Diagram Of Inside Blood. The first row has been completed for you. The endothelium lines the inside of the vessels.
Blood vessels are more like a network that helps circulate blood throughout your body. Blood is transported in arteries veins and capillaries. The heart also ensures that adequate blood pressure is maintained in the body.
A red blood cell has what is known as a biconcave shape.
Arteries are quite tough on the outside but are smooth on the inside. The primary function of red blood cells is to transport oxygen to body cells and deliver carbon dioxide to the lungs. There are two types of circulation within the body namely pulmonary circulation and systemic circulation. Diagram 1 shows an animal cell and some of the structures inside the cell.