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.
• The human skeleton provides shape and form to the human body.
• The average human adult skeleton has 206 bones.
• It performs the following functions:
It helps in the movement of various body parts.
It provides shape and support to the body.
It protects the soft internal organs.
• Bones are filled with a substance called marrow, which produces blood cells.
Different parts of the human skeleton:
• 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.
• 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.
• The backbone is made up of 33 small bones called vertebrae.
• It surrounds and protects our spinal cord.
• 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.