Cell to organ system

OmoYou might have ever seen how house are made it is built up of bricks the wall is built by adding a lot of bricks and rooms is made of walk and house is made up of rooms just like that are body is made

Iffect the body is composed of various organ system such as the district system respiratory system skeleton system etc these organ system consist of organs like stomach small intestine lungs heart etc organs again consist of small structures   which are called  tissues tissues are made up of the smallest structures cells 

 There are different types of organisms in the world which appear different from each other but one thing is common in all organisms that the body is made up of many Microsopic unit which are called cell we can better understand by comparing the bricks with cell group of bricks with tissues wall with organs rooms with organ system and house is compared with wool body 

Cell- Tissue- Organ- Organ system- Body

Cell:-

 Cell is the structural and functional unitof the body dear number difference in organisms such as amoeba Paramecium euglena etc are made up of only one cell they are called unicellular organisms.

Earthworm, elephant human monkey banyan etc consist Maine Sel called multicellular organisms whatever the number of cell activities like nutrition excretion growth respiration and reproduction occursin all organisms.

 cell is the fundamental structural and functional unit of living organisms.

 structure of cell :-

 a Microsoft is required to study the structure of the cell the cell was first studied buy a scientist  rubber hook in 1665. He say the cell by Microsoft which he made himself

generally a cell have three part sell membrane nucleus and cytoplaam many smell structure are also seen in the cytoplame they are called cellular organelles the cell of plant and animal are different in structure the cell of plant and animal have some similar organelles handsome dissimilar organ lens a plant and Animal cell 

 Tissues 

 you know that all plants and animals are made up of cell unicellular organisms example Amoeba paramesium all biological function respiration decision expression etc occur in the single cell Multicellar organisms have in numberable cell in these organs special function is per formed by a group of cell for example in a group of muscular cell constant and expand never cell  convey the message and conduction of water takes place in plant thought xylem what will you call such group of cell cell which are able to perform same function within the body are in a group A group of cells which are of similar organ and structure which perform a space fick function called  tissues 

 plant tissues 

 you know that increase in height of animal is up to a curtain age but in plant growth is life long and new benches aregrowth is life long and new benches are are formed thus it is clear that some plant tissues divided lifelong these tissues are limited to some part of plants on the basis of division compart City plant tissues and divided into  meristematic tissue and permanent tissue.