slide1 n.
Skip this Video
Loading SlideShow in 5 Seconds..
Bones PowerPoint Presentation
play fullscreen
1 / 12


92 Views Download Presentation
Download Presentation


- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Bones • Bones: More than 206 bones support the body and provide protection for organs such as the brain, heart and lungs. The bones of the skeleton act as a frame to which muscles are attached. These skeletal muscles allow the body to move; they are attached to bones by bands of tough elastic tissue, called tendons, and it is by means of tendons that they exert their pull. Another important task of bones is to produce blood cells. Finally, the bones provide a store of chemicals such as calcium salts, which are released into the bloodstream, as they are needed.Read more: Know your skeletal System | Medindia

  2. Types of bones: -Man has evolved with bones specialized into four main types, each with a different role:-1) The long bones: - eg:- in the limbs, they are thin, hollow and light, they play as essential role in all types of movements.2) Flat Circular bones: - eg:- bones that form the spine or vertebral column3) Long Circular Bones: - eg. Ribs, they are strong but elastic giving the chest the flexibility and springiness it needs for breathing.4) Flat irregular bones: - eg:- shoulder, blades, hips and skull these are strong but light and protect delicate organs, such as the brain.Read more: Know your skeletal System | Medindia

  3. Head : The bones of the skull surround & protect the brain; the lower jaw is hinged to the skull.

  4. Chest : The bony cage of the ribs, connected to the spine at the back and the breastbone at the front, surround and protect the organs in the chest.Read more:

  5. Spinal Column : The 7 vertebrae in the neck and the 20 in the back make the spinal column.

  6. Pelvis : The bones of the pelvis surround the lower abdominal organs, support the spine and provide attachment for the legs.

  7. Hand : Eight bones make up the wrist, five the palm, and 14 hinged bones form the fingers and thumb.

  8. Leg : Three major leg bones are suspended by ball and socket joints from the pelvis

  9. Foot : The bones of the foot form arches, so that the weight is carried on the heel and toes.

  10. Muscles:There are about 650 muscles in the body, and they are divided into three different types, skeletal, visceral and cardiac The skeletal muscles move the arms, legs, and spine The visceral muscles control movements in the walls of blood vessels, the stomach and intestines. The cardiac muscles produce the pumping action of the heart. All the muscles are present in the body at birth, and everyone has the same number of muscles, consisting of the same number of fibres

  11. At birth we have over 300 bones. As we grow up, some of these bones fuse together as a result an adult has only 206 bones.2. The Human hand has 27 bones.3. The Femur, or thigh bone is the longest bone in our body and is about a quarter of our height.4. The human body has 230 movable and semi- movable joints.5. The Human skull is made up of 29 different bones6. The strongest muscles of the human body are masseters, these are present on either side of the mouth and help with chewing and grinding food in our mouth.7. The Thighbone is so strong that it withstands the axial load of about 1600-1800 kilos.8. Most of the bones in the human body constitutes about ¾ of water.9. The whole leg consists of 31 bones.10.Almost every seven years, the human body the equivalent of an entirely new skeleton.Read more: Know Your Body - MusculoSkeletal system | Medindia