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THEME 2
Practice Life Sciences

2 Humans

Textbook Page: 19 – 48
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SMART NOTES

2.1 Human Skeletal System

1. Human skeletal system consists of the bones in the body.

Skull – Protects the brain
from injury

Rib – Protects the internal organs

Backbones – Supports the body

Hand bone – As support and
movement

Leg bone – As support and
movement

2. Joint is a meeting point of two or more bones. The circled parts in the diagram above are the joints
located in human body.
3. We need joints to move our bodies. Joints enable movements and f exibility of the body.
4. The functions of joints:
(a) Joint at the neck bone enables head movement in rotation or turning motion.
(b) Joint at the shoulder bone, hand bone and backbone enables movement of the upper part of
the body.
(c) Joint at the shoulder bone enables movement of the hand backward, forward, to the side or
doing a rotation.

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