Hello dear students....

Today you are going to know about Human Endoskeleton.

So firstly,
You should know about that study of skeleton is known as osteology

Now lets start,

  1.  The skeleton of vertebrate is divided into two types endoskeleton and exoskeleton.
  2. Exoskeleton is non living derived either from epidermis or dermis of skin, e.g., scales.
  3. Endoskeleton in invertebrates includes elements made of living skeleton connective tissue called cartridges and bones.
Total bones in human Endoskeleton are 206 while in newly born baby have 300.

(Human Endoskeleton)
 
   Bone                                  number
  1.Axial skeleton      (total bones are 80)
 (i)  skull                             29
 (ii)  vertebrae                   26
 (iii) ribs                              24 (12 on each
                                               side)
 (iv) sternum                       01

2. Appendicitis skeleton   (total bones                                                      are 126)
  (i) upper extremity          (total bone 64)
   
    (a) pectoral girdles           04
    (b) upper arms                  02
    (c)  lower arms                  04
    (d) wrists                            16
    (e) palms                            10
    (f) fingers                           28

 (ii) lower extremity        (total bones 62)
 
    (a) pelvic girdles             02
    (b) thighs                          02
    (c) knee caps                    02
    (d) lower legs                   04
    (e) ankles                          14
    (f) soles                              10
    (g) toes                               28

Some important points about the bone...


  • Femur is longest bone and stapes is smallest bone.
  • Arthrology  is the study of joints.
  • Fibula is the thinnest bone.
  • Tibia is shin bone.
  • Sternum is absent in fishes.
  • Tibia-fibula is the longest bone of frog.
  • Funny bone is a bone found in a bend of the elbow.
  • Spondylitis is inflammation of vertebrae
  • Synovitis is inflammation  leading to swelling at joint.
  • Chondrology is the study of cartilages. 
  • Bone is the hardest tissue. 
  • Os-penis is a bone found in the penis of rodents.
  • Fibro cartilage is strongest cartilage. 


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