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Skeleton video 2

Added Nov 05, 2014 •

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the skeletal system includes all bones of the body plus the joints where they attached to each other our skeleton protects our internal organs provides a frame search for scaffolding that allows us to stand upright and move minerals that our body needs to function properly and is blood cells  her muscles pulling this way or that way on our bones produce movement and without the protection of our skeleton simple bump on the head or chest could injure vital internal organs pound-for-pound the bones of the skeletal system are stronger Steel restaurants from the skeletal system is made up of 206 different bones which come in for basic shapes long bone such as the femur  short bones like the wrist and ankle bones flat bones such as in the skull or scapula and irregular bones like the vertebrae  the two types of bone tissue compact bone which is dense smooth and very strong which is spongy and lightweight both types of bone tissue living cells which help make repairs if a bone is injured or broken a typical long bone has a main shaft called the diaphysis composed of compact bone and two ends called appendices composed of cancellous bone the main shaft is covered the membrane of living cells called periosteum to which muscles and tendons attach themselves inside the main shaft is a cavity call the medullary cavity which contains bone marrow bone marrow stores fat produces blood cells and plays an important part in the body's immune system the skeletal system is divided into two divisions the axial skeleton which consists of bones that form the longitudinal axis of the body which consists of phones that are appended to the axial skeleton the axial skeleton includes a T Bones comprising the skull vertebral column and four next the appendicular skeleton consists of the bones of the shoulders upper extremities hips and lower extremities the bones of the upper extremities or arms are connected to the axial skeleton via the shoulder girdle this consists of the are shoulder blade and the clavicle or collarbone  the arm itself is composed of the humerus or upper arm and the radius an owner of the forearm plus the wrist and hand which consists of 27 separate bones  because of large number of small bones are capable of movement than any other part of our body the bones of the her extremities are legs are connected to the axial skeleton via the pelvic girdle which is formed by the two hip bones  zipper Tech the bladder reproductive organs lower colon and rectum  in the mail the pubic arch of the pelvis is 90° wide in the female greater than 90° this difference in width is necessary for the female pelvis accommodate childbirth the longest heaviest and strongest bone in the body is the femur commonly called the thigh bone at one end it is connected to the pelvis and at the other end to the lower leg which is made up of the tibia or shin bone and fibula the tibia Bears all of our bodies weight the fibula up there is no wait at all  the patella or kneecap is a large bone between the femur and fibula it protects the knee joint and tendons that form the knee  the bones of the ankle and foot must care all of our body weight as we stand walk or run and the 26 bones and 33 joints that make up our ankle and foot enable it to do just that the entire skeletal system of an average adult weighs less than 10 kilograms if you're tempted to replace this with a steel skeleton that was just a strong it would weigh 400 kg and still would not have resilience of bone or the ability to repair itself harder than reinforced concrete lighter than stainless steel able to repair itself bone is the near-perfect material to provide the framework for the human body

Uploaded by Renee Klein.

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Skeleton video 2

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