, Cells
Cell is the basic unit of biological organization of human body .
The body is made up of trillions of cells . Although they have a different function ,
they have common structural properties .
cells can only be seen under the light microscope .
cells are measured in terms of micron . (7Mm = 10-3 mm)
Tissues
Tissues are groups of cells with Similar function and structure .
They are classified based on how cells are arranged and how much material
found between cells .
There are 4 basic types of tissues :
Epithelial tissue
covers body surfaces and lines body cavities .
apical surface portion of cells exposed to lumen .
·
the rest of the cells which rests
basal Surface on
the basement membrane .
·
underlying tissues by specialized membrane
basement membrane .
basement
membrane
Function of epithelial tissues :
.
7 protects underlying tissues
sun and certain chemicals .
·
Lining of digestive tract protests underlying tissue from enzyme as food
moves through the tract.
.
2 Absorbs
·
In the lining of digestive tract , nutrients from our digested food are
absorbed into blood capillaries and get carried to the cells of our body.
.
3 Secrets glands
4.
Excretes waste products .
Cell is the basic unit of biological organization of human body .
The body is made up of trillions of cells . Although they have a different function ,
they have common structural properties .
cells can only be seen under the light microscope .
cells are measured in terms of micron . (7Mm = 10-3 mm)
Tissues
Tissues are groups of cells with Similar function and structure .
They are classified based on how cells are arranged and how much material
found between cells .
There are 4 basic types of tissues :
Epithelial tissue
covers body surfaces and lines body cavities .
apical surface portion of cells exposed to lumen .
·
the rest of the cells which rests
basal Surface on
the basement membrane .
·
underlying tissues by specialized membrane
basement membrane .
basement
membrane
Function of epithelial tissues :
.
7 protects underlying tissues
sun and certain chemicals .
·
Lining of digestive tract protests underlying tissue from enzyme as food
moves through the tract.
.
2 Absorbs
·
In the lining of digestive tract , nutrients from our digested food are
absorbed into blood capillaries and get carried to the cells of our body.
.
3 Secrets glands
4.
Excretes waste products .
