They have two short forelimbs and two large hind legs that assist the Kangaroo in jumping long distances or heights. Using its legs the Red Kangaroo can jump over 8 feet high and over 20 feet long. The Kangaroo cannot walk and is limited to jumping or bounding for motion. The tail assists the Kangaroo in balancing while it jumps from place to place. The ears are large and likely help it keep cool.
Natural foods high in vitamin D include fish oils, fatty fish, mushrooms, beef liver, cheese, and egg yolks. Vitamin D is also naturally made by your body when you expose your skin to the sun, and is called the sun-shine vitamin.
Vitamin D is the name given to a group of fat-soluble prohormones (substances that usually have little hormonal activity by themselves but that the body can turn into hormones). Vitamin D helps the body use calcium and phosphorus to make strong bones and teeth. Skin exposed to sunshine can make vitamin D, and vitamin D can also be obtained from certain foods. Vitamin D deficiency can cause a weakening of the bones that is called rickets in children and osteomalacia in adults. Two major forms of vitamin D that are important to humans are vitamin D2, or ergocalciferol, and vitamin D3, or cholecalciferol.