1. The Organisation of Living Things
Chapter6
The Organisation of Living Things

2. Levels Of Organisations
Cell level
Tissue level
Organ level
System level
Community
Ecosystem
Biosphere

3. Organisations of living things
The structure of living things is suited to functions they must perform.This is known as

4. Cell level This is the lowest levels of organisation in living thing.
It is seen in unicellular living things.e.g.amoeba,spirogyra,euglena,paramoecium

5. Tissue level
Agroup of cells all of which perform the same function is called a tissue.e.g.moss,algae,hydra.

6. Organ level
Various kinds of tissues come together to form an organ.e.g.stomach,
leaf,liver.

7. System level
A group of organs which together carry out a certain function is called a system.
This is the highest level of organisation.

8. Community
The group of organisms of all the various species living together in any one habitat is called community.

9. Ecosystem
The living and non living factors together form an ecosystem.e.g. lakes,forests,seas,river,land.

10. Biosphere
The part of the atmosphere,hydrosphere,lithosphere occupied by living things is called Biosphere.

11. Question Hour Name the organ systems you know.
How does tissue level organisation occur?
Define ecosystem ,biosphere,tissue,organisation in living things.
Explain ecosystem.