Movement in human beings

 


MOVEMENT IN HUMAN BEINGS


•    Different parts of our body move even when we remain at the same place.

•    We also move from one place to another — we get up and go to our teacher or to the school compound, or go home after school.

•    We walk, run, skip, jump and move from place to place.

 

Human Skeleton:

•    The human skeleton provides shape and form to the human body. 

•    The average human adult skeleton has 206 bones.

Human skeleton

•    It performs the following functions:

  1. It helps in the movement of various body parts.

  2. It provides shape and support to the body.

  3. It protects the soft internal organs.

•    Bones are filled with a substance called marrow, which produces blood cells.

 

Different parts of the human skeleton:

Skull

•    The skull protects the brain from injury.

•    All bones in the skull are fixed, except the lower jaw.

•    The lower jaw can be moved and it allows us to talk and chew food.

 

Rib cage

•    The rib cage provides protection to our heart and lungs.

•    Most people have 12 pairs of ribs.

•    We can feel our ribs by running our fingers across our chest.

 

Backbone

•    The backbone is made up of 33 small bones called vertebrae.

•    It surrounds and protects our spinal cord.

Backbone (spine)

 

Limbs

•    We have two pairs of limbs.

•    The hind limbs (legs) are used for walking.

•    The forelimbs (arms) allow us to do a variety of tasks such as lifting and using objects.

•    Bones are rigid structures that cannot bend.

Joint- where two bones meet

•    All our movements are brought about by joints and muscles.