CBSE Notes for Class 6 Science Chapter 8 – Body Movements

Important Notes for CBSE Class 6 Science Chapter 8 – Body Movements. Body Movements Class 6 Notes and Study Material Download in PDF form.

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Human skeleton :

  • The human skeleton and skeletal system is made up of 206 bone.
  • The bone of our body act as framework or give it shape .
  • The bone are also protect internal organ .

Parts of human skeleton

Skull :

  • The bones of skull is hardest of all the bones.
  • Skull bones protect our brain and rest of the facial bone give shape and frame to our face.

The spine :

  • The spine also called vertebral column or back bone.
  • It consists 33 small bone.
  • It start from the neck down to the tail bone or hip region.

The rib cage:

  • Joint the chest bone and back bone together to form cage .
  • It protects our internal chest region organ lung , heart .

Collar bone :

  • Collar bone are either side of the neck.
  • The collar bone is attached to the shoulder blade and breastbone.
  • It give shape to the shoulder and help in movement of arm.

Fore arm:

  • The arm has two part the upper arm and fore arm joint at the elbow.
  • One long bone run through upper arm , and it give shape to the fore arm.

The hip bone :

  • The hip bone is form by three bone fused together , two hip bone is joint with vertebrae in hip region.
  • The hip bone and vertebrae joined to form the pelvic girdle.

Joints:

The place where two or more bone meet in the skeleton . We can move or bend only at those points.

  • Ligament connect the bone forming the joint .
  • The end of the bone covered with cartilage.
  • A thick oily liquid present – lubrication.

Fixed joint :

  • Some joint do not allow any movement these are fixed joint.
  • Example : joint between teeth and jaw bone.

Ball and socket joint :

  • These joint allow the greatest freedom of movement or are the most Mobile.
  • Example : hip and shoulders joint.

Pivotal joint :

  • A cylindrical bone turn in a ring type bone . Full rotation not possible.
  • Example : neck attached to the head help in side way back and fourth movement.

Hinge joint :

Link door hing , only back and forth movement possible.

Example :  ankle , elbow , knee .

Movement :

  • Most animals move from one place to another place .
  • This type of movement is called locomotion.
  • We use our legs for locomotion.
  • Animals that have vertebral column are called vertebrates .
  • All vertebrates move with the help of bone and muscle.

Snake :

  • Snake can move very fast due to flexibility of their back bone .
  • Snake vertebrates column is made up of 100-400 vertebrae that are connected to ball and socket joint.

Fish :

  • The head and tail of the fish is smaller then the middle portion , this type of the body is called as streamlined.
  • The shape is such that water can flow around it easily and allow the fish to move easily.
  • The skeleton of dish is covered with very strong muscles.

Birds :

  • A smooth streamlined body, offer little resistance to the flow of air .
  • A skeleton made up of Hallow bones make birds light so it can hold body up in the air .
  • Big strong flight muscles attached to the wings, helps it flaps it’s wings .

Invertebrates move :

  • Most of the animals are invertebrates , they do not have vertebral column or internal skeleton made  of bones.

Insect :

  • Insect have hard covering over their body , or an exoskeleton.
  • When insect walk three legs two on side and one on the other , support the body while the other three move the body forward .
  • Most of the insect can fly with the help of two pairs of wings

Snail :

  • Snails have soft body which they can pull back into their heavy shell.
  • They have large flat foot which secret slimysubstance , with the help they move forward.
  • The movement of the foot is contracted by muscle attached to it.

Earthworm :

  • The body of earthworm is made up of many rings joined end to end .
  • An earthworm does not have bones.
  • Movement of Earthworm is first extend to front part blog the body keeping their half portion fixed to the ground.
Body movement Class 6 Notes
Updated: July 31, 2021 — 11:49 pm

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