- Metabolism: Catabolism- protein catabolism via transamination; amino group are separated from carbon of amino acids. Anabolism- healing of wounds, growth of bones.
- Responsiveness- External: when the body sweats because of heat. Internal: when white blood cells defend the body against infection.
- Movement- blinking of our eyes, pumping of blood of the heart.
- Growth- growth in nails and hair.
- Differentiation- neural stem cells becomes neurons
- Reproduction- reproduction of red blood cells in the bone marrow