In large numbers these cells become tissue, and ultimately organs and other structures. All living cells need nourishment and access to substances required to maintain life for cells to carry out their functions. Requirements to maintain life and function include energy compounds, building blocks, oxygen, water, vitamins and minerals. The Body transports the vital requirements via fluids in the Cardiovascular and Lymphatic System. The fluids are blood and lymph.
Blood is transported via arteries, veins and capillaries.
Lymph moves through lymph vessels. Lymph eventually drains into veins, and is mixed with blood for recirculation. Adequate fluid intake is crucial to maintain blood health. Cardiovascular fitness ensures good circulation. The blood system is very sensitive to malnutrition.