Question

Knee joint and elbow joints are examples of :
A. Saddle joint
B. Ball and socket joint
C. Pivot joint
D. Hinge joint

Answer 1

Skeleton system consists of the framework of bones in a few cartilage . This system is a significant role in the movement shown by the body. Imagining chewing food without jawbones and walking around without limb bones.

Complete answer:
Joints are points of contact between bones or between bones and cartilage. Force generated by the muscle is used to carry on movement through the joint where the joint acts as a Fulcrum. The movability of these joints varies depending on different factors. Joints can be classified into three major structural forms namely fibrous, cartilage, and synovial.
Synovial joints are characterized by the presence of fluid-filled synovial cavities between the articulating surfaces of the two bones. Such an arrangement allows considerable movements. This joint helps in locomotion and in many other movements.
Types of synovial joint :
a. Ball and socket joints are present between the humerus and pectoral girdle.
b. Hinge joint is present between the knee joint and elbows joint.
c. Pivot joint is present between the atlas and axis.
d. Gliding joint present between the carpals.
e. Saddle joint present between the carpal and metacarpal of thumb.
So, the correct answer is ( D ).

Note: Fibrous joints do not allow any moment this type of joint is shown by the flat skull bones Which fuse end to end with the help of dense fibrous connective tissue in the form of sutures, to form the cranium. Cartilages join in the bones which are joined with the help of cartilage. The skeleton system is divisible into axial and appendicular. The number of bones present in adult humans is 206.