EVERYDAY SCIENCE

Detailed explanation-1: -Ball-and-socket joints, such as the shoulder and hip joints, allow backward, forward, sideways, and rotating movements. Hinge joints. Hinge joints, such as in the fingers, knees, elbows, and toes, allow only bending and straightening movements.

Detailed explanation-2: -[3][4] The hinge joints of the body include the elbow, knee, interphalangeal (IP) joints of the hand and foot and the tibiotalar joint of the ankle.

Detailed explanation-3: -Final answer: Shoulder joints are a type of ball and socket joint.

Detailed explanation-4: -The shoulder and hip joints present special difficulties, because they are ball and socket joints, not hinge joints, so movement in a number of planes can occur. In human anatomy, flexion of the shoulder is defined as swinging the arm forwards and across the trunk, extension is the converse.