Question

Which of the following parts of our body help us in movement?
(i) Bones
(ii) Skin
(iii) Muscles
(iv) Organs

A) i and iii
B) ii and iv
C) i and iv
D) iii and ii

Answer 1

Hint: Movement is the change in the position of a body part with respect to the whole body. It is considered one of the significant features of all living beings. Some examples of movements are the blinking of the eyes, breathing, eating and so on. So, we can say that every second some or the other part of our body show some kind of movement.

Complete answer:
In a normal human being, the movement starts from the crawling stage and with the increase in age the person starts walking thereby leading to the movement of the whole organism.

An adult’s human skeleton comprises around two hundred six to two hundred thirteen bones. All these bones form a framework and provide shape to our body. This framework is called a skeleton. Our hand is made up of several small bones called Carpals which help in their movement.

Skin is the outermost layer of usually soft, flexible tissue that covers the body of a vertebrate animal. Its function is to help in protection from the internal organs, regulation, and sensation. Therefore the skin does not have a role in the movement.

Muscles undergo contraction and relaxation and work in pairs which helps in the body movements. Muscle cells contain protein filaments which are called filaments of actin and myosin that slide past one another, thereby producing a contraction that changes both the length and also the shape of the cell. Muscles function in order to produce force and motion.

An organ is a group of tissues with similar functions. Organs lie between tissue and organ systems. Two or more organs help in performing a specific body function form an organ system, also called a biological system or body system. Hence an organ also does not help in movement. Therefore, we can say that bones and muscles help in body movements.

Hence the correct answer is option ‘A’.

Note: Joints are basically areas in our body where two or more parts of our skeleton are connected together. Different joints in our body help in carrying out different activities and movements. Some types of movements can result in a change of place, they are called locomotion such as walking, running, and swimming.