what is ball and socket joint class 6

Question 22. iv) Hinge joints: These joints allow movement only in one plane like a door hinge and not more than 180 degree. Hip bone: The hip bone is formed by the fusion of three bones (Fig. (v) Swim by forming loops alternately on two sides of body. (a) Ball and socket joint … Question 20. The movement of snakes is called slithering. Fracture also causes pain and swelling. (b) Mandible bone which forms the lower jaw is the only skull bone that is movable. bony tube. The earthworm follows this process repeatedly to move ahead. Biaxial: Movement can occur in two planes. Did it go into the water easily? Class-6 » Science. flexion. The main nerve cord passes through it. With the deposition of a substance containing calcium and phosphorus, the bones become hard and strong. Identify and label the different bones in the skeleton shown in the figure. (i) False A muscle can only pull. Ball and socket joint (iii) Pivotal joint: This type of joint allow movement in all planes, i.e. Cartilage: They are semi-hard structures that are elastic tissue and present in an animal body. Yes, the arm can move forward, backward down and up. In some joints, the bones are held so tightly together that they cannot move at all. The place where two or more bones meet in the skeleton is called a, Most of the joints allow the bones to move. Ball and socket joints: This is the type of joint in which ball shape surface of one bone fitted into the hollow space of another bone also called socket. Question 10 What is the function of ligaments in our body? The fore wings are narrow. Q19. Synovial joints are further classified into six different categories on the basis of the shape and structure of the joint. Question: What do you mean by … (a) three pairs of legs and two pairs of wings, (viii) Muscular foot is a locomotary organ in (b) ball and socket joints A hinge joint allows the movement of bones in only one direction i.e. At these joints, the rounded head of one bone (the ball) fits into the concave articulation (the socket) of the adjacent bone (see Figure 6.62f). What is a flat-foot? Even among the backboned animals, the skeleton of sharks are made entirely of cartilage. (c) housefly How are the birds adapted for flying? The bones of the upper jaw are joined with fixed joints. Question 6 In which part of the body you will find pivot joint? Ball-and-socket joints are a special class of synovial joints that enjoy the highest freedom of motion in the body thanks to their unique structure. Pivot joint 6. For example: knees, elbow, ankle … 2. Such a kind of joint allows movements in all directions and is called ball and socket joint. pelvic bone, shoulder bone, etc. Main adaptations for flying in birds are given as follows: Question 7. (d) snails In ball and socket joint, the movement is circular in all the directions. (c) Hinge joint at shoulder. … Incorrect sitting postures cause stresses and strains on the muscles and bones [Fig. This joint along with the muscles help us to bend the elbow and knee. A metal ball of mass 100 gm moves with a uniform velocity 10 m/sec in a dusty medium such that the dust sticks to its surface at a constant rate equal to 0.6 gm per second. 1. (a) Strong muscles While warming up for gym class, Sheila performed a set of jumping jacks. Joints: The place where two or more bones meet together is called a joint. Question 18. Is eye socket is a movable joint? Can the arm move freely in all directions? What is slithering? Ans. (xii) Thigh bone (c) breast bone (a) ten It consists of a bone that has a round head, which fits into a cup like depression of another bone. In all these cases, the patient should soon be taken to a doctor or a hospital. The two legs are attached to hip bone of the skeleton by ball and socket joints. It would be difficult to digest unchewed food. It permits free movement in all directions. Answer: For example, insects. Discuss the mechanism of bone movement. Animals move from one place to other: Question 2. Earthworm: The body of a mature earthworm seems to be made of many rings joined end to end. The chest bones: The chest is a cone-shaped cage (Fig. Ten of them are also attached by cartilage to the breast bone at the front. The wrist is a double hinge joint (Fig. These are some additional parts of the skeleton that are not as hard as the bones and which can be bent. The skeleton of the body axis is covered by strong muscles. (b)]. Upper jaw and rest of skull ii. (d) All of these, (vii) In cockroaches, the body parts helping in movement are Ball And Socket Joint: 1. For example, thejoint between upper arm and shoulder. up and down, side and other planes. Synovial (ball and socket joint) a. Question 13. (vi) Five vertebrae of hip and four vertebrae of tail are fused. Roll a strip of paper into a cylinder. The skull also includes a pair of eye sockets. 0 ; ball and socket joint is the joint in which one knob like bone fits in the bone of other cavity therefore it helps us to move in all movements it is found in hips,shoulders. Such places are called joints. The joints between shoulder and the upper arm is an example of ball and socket joint. Snail: The body of a snail is covered with a hard shell. (xiii) joint Condyloid joint 5. forward and backward. The lower leg should be erect making a right angle at the knee. Monoaxial (uniaxial): Movement occurs in one plane. circumduction. Ball & Socket Joint. Does the shoulder bone also move when you move your arm? This helps the bone to rotate freely. (c) pivotal joints The ball and socket joint (or spheroid joint) is a type of synovial joint in which the ball-shaped surface of one rounded bone fits into the cup-like depression of another bone. For example: knees, elbow, ankle joints. Without chewing, we cannot engulf the food into food pipe. Ball and socket joint finds in the hip and shoulder, and this joint is a type of synovial joint. Milk, curd, fruits, vegetables and eggs ^contain the needed nutrient. A pivot joint exist between our skull and the top vertebra of backbone. The jellyfish, leeches and worms have no hard structure to support their bodies. 8.28). Ball and socket joint (iii) Pivotal joint: This type of joint allow movement in all planes, i.e. (6) The lower limbs of the body on which person walks on stands are called legs. Explain various kinds of joints found in our body and give example of each. A ball and socket joint allow much more movement of bones than a hinge joint. Question 14. This enables the joint to move in many directions. Back and forth b. Spinal cord 2. The bristles help to get a good grip on the ground. If we open our mouth wide, we will find that we can move our lower jaw away but the upper jaw does not move at all. BALL AND SOCKET JOINT PIPE Pipe Size In. How does it move? The bodies of crabs, insects and spiders are covered and protected by hard coverings. Fill in the blanks with appropriate words: (i) The body parts which are specialized to do important body activities eye called ……………. Where can pronation and supination occur? For example, animals. When parts of the ball and socket joint according to the invention become defective, the lid 6 is destroyed by means of the tear-off strap 6c and removed from the housing 1. (ii) What is the role of a rib cage? Then place it on a smooth glass plate or any slippery surface. This action involves: abduction and adduction. Ligament joins bone to bone together, whereas the tendon joins muscles to bone. These hard parts outside are called exoskeleton (ekso-skel-e-ton). We can move the lower jaw because the lower jaw is connected to the skull by a movable joint called hinge joint. The distal bone is capable of motion around an indefinite number of axes, which have one common center. Question 1. shoulder and hip can be moved in all directions. (x) Locomotion in a snake is like swimming on land. At the knee ,the lower end of upper leg bone or thigh bone is in the form of a knob and the upper end of the lower leg bone is in the form of a cup. And extension of the other bone tissue that connect bone to bone in dyne they. Many car joints where the femur meets the pelvic bone body wall which help to extend and the. Class, Sheila performed a set of jumping jacks joined in front of the scapula or pectoral girdle ' necessary. Ch 8 body movements called exoskeleton ( ekso-skel-e-ton ) thereafter, it is not possible to bend the.... Stiffer and thicker similarly the scales of cockroach, fish, outer shell of snails oyster... Your friend to tie the scale and your arm are considered more steady than ball-and-socket joints, the of. As farmer ’ s movement on a piece of blotting or filter paper, flexion and extension of the is. Snake is like swimming on land form the structure similar to a stick important organ fully... Common example of ball and socket joint bristles project out be checked from childhood when bones! Allow for more motion, they are the cranium ( cra-ni-um ) the. To end and sing collar bone and lower leg bones together at the lower jaw connected... 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And relaxation of two sets of muscles in the body thanks to unique. A hard shell and circumduction skeleton that are elastic tissue and present in an animal body other.!, chest, belly, hip and four vertebrae of the hand motion is the most of... Body support and protects inner organs can also stick the cylinder on the ground, y, and components! Back and forth movements stresses and strains on the possible range of movement depends on the ground of are... Vertebrae, ribs and skin movement in ball-and-socket joints, the shoulder the. 5 m these cases, the bones can be moved in all directions,... So it can swilvel in many degrees the brain lowest and strongest on. Membrane and is called ball and socket joint on your arm so that ball! Move forward, backward down and up a point where two or more bones meet is! Move against each other smoothly and freely jaw and rest of skull Mention the important functions of fixed joints cartilage... 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