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Human Bones, Joints and Muscles

by Vinodh Reddy

1. Bones

The Skeleton System:

1.1) Axial Skeleton (80 bones):
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1.2) Appendicular skeleton (126 bones):

Girdles:

Limb bones:

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Ankle (tarsal) bones:

Instep (metatarsal) bones:

Toe bones:

Human skeleton system

2. Joints:

Joints are the place of articulation between two or more bones or between a bone and a cartilage.
Types of Joints:

  1. Fixed or immovable or Fibrous Joints: there is no space between the bones and sutures present between the skull bones and the articulation of the roots of teeth with sockets of maxillae and mandible. Sockets of maxillae are the two examples of such a joint.
  2. slightly Movable or Catilaginous Joints: In such joints, the opposing surfaces are connected by fibrocartilage. Joints between adjacent vertebrae are examples of such joints.
  3. Freely Movable or Synovial Joints: In such joints a space between the bones is present, called synovial cavity. This cavity remains filled with a viscous and slippery synovial fluid. The examples of synovial joints are 1. Ball and socket joints, 2 Hinge joints, 3. Pivot Joints, 4. Gliding joints and 5. Ellipsoidal joints.

3. Muscles:

Human anterior and posterior views of the muscular system
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