ADAPTATION
The presence of specific features and habits, which enable a plant or ananimal to live in a particular habitat, is called adaptation.
Class 6
MUSCLES
Muscle is the fibrous tissue in the body that has the ability to contract and relax . Muscles are attached to the bones of our skeleton through strong fibres called tendon. When the muscles attached to bone contracts, it pulls the bone due to which the bone moves at the joint.
BRISTLES and CAVITY
Bristles are hair like structure, connected with muscles. The bristles help to get a good grip on the ground. ‘ Cavity: It is the hollow space or cavity in one bone, into which the other bone fits. Such joint allows movements in all directions.
SHOULDER BONES
Shoulder bone or Pectoral Girdle: The shoulder bone is formed by the collar bone and the shoulder blade. It is attached to the upper part of the rib-cage and to the upper arm bone.
STREAMLINE
A streamlined body ( BOAT SHAPE) is a shape that lowers the friction drag between a fluid ( air and water).
FIXED JOINTS
The joints where no movement of bones is possible are called fixed joint. The joints in the skull bone (cranium) are examples of fixed or immovable joints. Moveable joint: Movement is possible in these joints.
RIB CAGE
Ribs join the chest bone and the backbone together to form a box. This is called rib cage. Shoulder bones: The two bones of the shoulders are called shoulder bones. Skeleton: The framework of the body which is made up of bones and cartilage is called skeleton.
Gait of Animals
1) The bones are moved by alternate contractions and relaxations of two sets of muscles.2) The bone joints are of various kinds depending on the nature of joints and direction of movement they allow.3) Strong muscles and light bones work together to help the birds fly. They fly by flapping their wings.4) Fish swim by …
SKELETON
This framework of our body is called the skeleton We can have some idea about the shape and number of bones in some parts of our body by feeling them. One way we could know this shape better would be to look at X ray images of the human body. Sometimes when we are hurt, …
Hinge joints
A hinge joint allows the movement of bones in only one direction i.e. forward and backward. In a hinge joint, the movement of bones is restricted to one direction by the shape of the ends of the bones which form the joint, and by the ligaments which hold the bones together at the joint.