Page 3 - 2. Lesson Notes-Structure of skeleton

The fore limbs-arms

• Humerus is one long bone in the upper arm.
• Radius and ulna are two bones in the lower arm.
• The humerus is attached to the vertebral column by collar bone and the shoulder
blade.

The hind limbs- legs

• The femur is the thigh bone which is the longest bone in our body.
• Tibia and fibula are two bones in the lower leg.
• The pelvis or hip bone that supports the legs and is attached to the lower end of the
backbone.
• The wrists, fingers, ankles, and feet have a large number of small bones.

WONDER BOX

• The stirrup is the smallest bone in the human body. Its length is 2-3 mm.
• It is one of the three bones present in the middle ear.

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