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Bones: Bodies
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Your leg bones are very large and strong to help support the weight of your body. The bone that goes from your pelvis to your knee is called the femur (say: fee-mur), and it's the longest bone in your body. At the knee, there's a triangular-shaped bone called the patella (say: puh-tel-luh), or kneecap, that protects the knee joint. Below the knee are two other leg bones: the tibia (say: tih-bee-uh) and the fibula (say: fih-byuh-luh). Just like the three bones in the arm, the three bones in the leg are wider at the ends than in the middle to give them strength.
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In addition to calcium, vitamin D and MBP®, Women's Ultra Mega® Bone Density ... contains the essential bone supporting nutrients magnesium and vitamin K. Magnesium is important because it helps build bones and maintain teeth. Vitamin K may play a role in bone health because it helps the body transport calcium and plays a role in bone matrix formation. Women's Ultra Mega® Bone Density is available exclusively at GNC stores.
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The seven bones in the ankle are called tarsal bones. The main part of the foot is made of metatarsal bones. Phalanges are the bones in the toes. The arch in the foot helps to support the body's weight.
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Bone building continues throughout your life, as your body constantly renews and reshapes the bones' living tissue. Bone contains three types of cells: osteoblasts (pronounced: ahs-tee-uh-blastz), which make new bone and help repair damage; osteocytes (pronounced: ahs-tee-o-sites), which carry nutrients and waste products to and from blood vessels in the bone; and osteoclasts (pronounced: ahs-tee-o-klasts), which break down bone and help to sculpt and shape it. Osteoclasts are very active in kids and teens, working on bone as it is remodeled during growth. They ... play an important role in the repair of fractures.
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Every time you sprint through the halls because you're late for class, score against your opponents during a game, or shoot pool with friends, you're using your bones, muscles, and joints. Without these important body parts, you'd be seriously sidelined — you'd be unable to sit, stand, walk, or do any of the activities you do every day.
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An adult human has 206 bones, which account for 14 percent of the body’s total weight. The longest and strongest bone is the thighbone, which at maturity is about 50 cm (20 in) long and 2.5 cm (1 in) wide. The smallest bone, the stirrup bone, is one of three tiny bones buried within the middle ear; it is only 0.18 cm (0.07 in) long.
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