Question

what is tissue and what is the utility of tissues in multi cellular organisms?

Answer 1

Tissue is defined as a group of similar or dissimilar cells that perform or help to perform a common function and have a common origin.

In multicellular organisms, the different types of tissues perform different functions. Since a particular group of cells carry out only a particular function, they do it very efficiently. So, multicellular organisms possess a definite division of labour.

 

Answer 2

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In unicellular organisms, a single cell performs all the basic functions such as respiration, movement, excretion, digestion, etc. But in multicellular organisms, cells are grouped to form tissues.

These tissues are specialised to carry out a particular function at a definite place in the body.

For example, the muscle cells form muscular tissues which helps in movement, nerve cells form the nervous tissue which helps in transmission of messages.

This is known as division of labour in multicellular organisms.

It is because of this division of labour that multicellular organisms are able to perform all functions efficiently.

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