Saturday, 21 December 2019

Inside The Cell In human body (Science Biology) Class 9th NCERT Syllabus

Inside Human Cell 

The smallest part of human body is cell and cell is made from different types of cell organelles.


What are Cell Organelles?

Cell Organelles are responsible for functioning in the cell on base of division of labor. Division of labor express the potentiality and ability of a cell organelles according to their structure and function and are give a special function to perform.

What is plasma membrane?

Plasma membrane It is the most outer covering of the cell organelle separates the internal composition and content from external environment and also some selective material to enter into the cell. It is also responsible of O2 in human cell.

Roles of plasma membrane 

Plasma membrane perform some special role in the functioning of cell. Some of theme are :-
(i) It acts as a selective permeable barrier.
(ii) It transport solution.
(iii) It respond to external signals.

What is cell wall?

Cell wall is a cell organelle which is mainly found in plant cell and mainly lies out side of the plasma membrane and mainly composed of cellulose. Which is a complex substance whose main function is to provide structural strength of plant.

What is plasmolysis?

Plasmolysis is defined as the contraction of the contain of the cell away from the cell wall, due to loses of water throw Osmosis.

What is Nucleus?

Nucleus Nucleus is a cell organelle which play the vital role in the reproduction of the cell and also in the process of cell division and has a doubled layer covering called Nucleus membrain containing pores which allows transfer of material inside and outside of the cell. It also contain chromosomes which caresses  the genetically materials which transfer from one generation to next generation through DNA and also contains protein.

What is Cytoplasm?

Cytoplasm Cytoplasm is the part of the cell which occurs between the Nuclear envelope and plasma membrane. Cytoplasm also contain some inner granular mass known as Endoplasm.


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