Which of these have least number of movable jointsa)Arms and handsb)Backbonec)Legs and feetd)SkullCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Skull contain least number of movable joints.

Answer

Because in skull there are 8 interlocked bones only lower jaw is movable.

Answer

Only lower jaw is moveable in the skull.

Answer

Arms and hands

Answer

Answer is Skull because all the bones in skull are immovable except lawer jaw.

Answer

D

Answer

Skull

Answer

Introduction
In this question, we are asked to identify the body part that has the least number of movable joints. Let's analyze each option and determine the correct answer.

Analysis of each option

a) Arms and hands:
The arms and hands consist of various joints that allow for a wide range of movement. The shoulder joint, elbow joint, and wrist joint all contribute to the flexibility and mobility of the arms and hands. Therefore, the arms and hands have multiple movable joints.

b) Backbone:
The backbone, also known as the spinal column, is made up of a series of small bones called vertebrae. Each vertebra is connected to the one above and below it by joints called intervertebral joints. These joints allow for some degree of movement, such as bending and twisting. Therefore, the backbone has multiple movable joints.

c) Legs and feet:
The legs and feet also consist of several joints that enable movement. The hip joint, knee joint, and ankle joint all contribute to the mobility of the legs and feet. These joints allow for actions like walking, running, and jumping. Therefore, the legs and feet have multiple movable joints.

d) Skull:
The skull is the bony structure that protects the brain. It is made up of several bones that are fused together and do not have movable joints. These fused bones provide stability and protection for the brain. Therefore, the skull has the least number of movable joints compared to the other options.

Conclusion
Among the given options, the skull has the least number of movable joints. Unlike the arms and hands, backbone, and legs and feet, the skull is made up of fused bones that do not allow for significant movement.

Answer

Option D becouse skull in immovable suturing type bone

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