Cytology:- The study of cell and it's component under the microscope is know as cytology. It deals with the structure only.
Cell Biology:- The study of cell and the function of it's different component is known as cell biology.
Who discovered cell:- Robert Hooke
Who wrote Micrographia:- Robert Hooke
Who discovered Living cell:- Von Leeuwenhoek
Commercial 'cork' is obtained from Quericus Suber. It's structure is like Honey comb. The first cell discovered by Robert Hooke was cork cell. It was discovered in 1665.
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| Magnified structure of cork cell. |
Von Leeuwenhoek in 1674 observed living cell in rain water contained injar. Bacterial cell was present in rain water. So the cell was protoplasmic, non intact.
* Definition of some basics:-
# Protoplasm- All the components present inside the cell membrane.
# Protoplast- Protoplasm + Cell membrane.
# Cytoplasm- The part of cell between plasma membrane and nucleus.
# Cytosol- The fluidal part of cytoplsam is called cytosol.
Protoplasm:-
* Term was proposed by J.E. Purkinje.
* Corti Proposed that protoplasm is living.
* Huxley called protoplasm physical basis of life.
Nature of protoplasm:-
# Colourless
# Odourless
# Tramsparent
# Colloidal
# Elastic
:- Two main states of protoplasm.
Sol and Gel. They are interchanging and are called physio chemical process.
Cyclosis- The movement of protoplasm inside the cell membrane is called cyclosis.
Importance of cyclosis:-
# Food vacuole moves which distributes the nutrient.
# Cell organelles move from one place to other which helps in formation of Pseudopodia.
# Composition of Protoplasm.
Water 80%
Protein 10-15%
Lipid 2-3%
Carbohydrate 2-3%
DNA+RNA 2%
Mineral element- Trace amount.
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