A- They help the body pass waste as urine. They also help filter blood before sending it back to the heart. The kidneys perform many crucial functions, including: ... creating hormones that help produce red blood cells, promote bone health, and regulate blood pressure.
b- The liver detoxifies chemicals and metabolizes drugs. As it does so, the liversecretes bile that ends up back in the intestines. The liver also makes proteins important for blood clotting and other functions.
c- The lungs' main function is to help oxygen from the air we breathe enter the red cells in the blood. Red blood cells then carry oxygen around the body to be used in the cells found in our body. The lungs also help the body to get rid of CO2 gas when we breathe out.
d- The skin has three main functions: protection, regulation and sensation. Wounding affects all the functions of the skin. The skin is an organ of regulation. The skin regulates several aspects of physiology, including: body temperature via sweat and hair, and changes in peripheral circulation and fluid balance via sweat. It also acts as a reservoir for the synthesis of Vitamin D.
Answer: Genetic variation describes naturally occurring genetic differences among individuals of the same species. Gene duplication, mutation, or other processes can produce new genes and alleles and increase genetic variation. New genetic variation can be created within generations in a population, so a population with rapid reproduction rates will probably have high genetic variation. And there are the reasons.
