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प्रश्न
What is an epithelium? Enumerate the characteristic features of different epithelia.
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उत्तर
Epithelial tissue is sheet of cells that covers the body surface or lines the body cavity.
- Simple epithelium is single layered.
- Squamous epithelium is made of flattened cells with irregular boundaries.
- Columnar epithelium is made of column like cells with round to oval nuclei at the base.
- Ciliated epithelium has ciilia at the free end.
- Compound epithelium is made of multi-layered cells.
संबंधित प्रश्न
What is the following and where do you find them in animal body?
Ciliated epithelium
Write the name of the following tissue.
Tissue lining the inner surface of the mouth.
Name the kind of cells found in the following place:
Inner lining of the wind pipe
Name the tissues found:
at the inner lining of the trachea.
Name the tissues found:
in the testes and ovaries.
The ciliated epithelium lines the______.
Some epithelia are pseudostratified. What does this mean?
Which is not a function of epidermis?
The dead element present in the phloem is
A long tree has several branches. The tissue that helps in the side ways conduction of water in the branches is
Write true (T) or false (F)
Epithelial cells have a lot of intercellular spaces.
Give reasons for
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
The ______ epithelium is also known as the pavement membrane.
An epithelial layer does not allow the regulation of materials between the body and the external environment.
Glandular epithelium gives a stratified appearance.
Sieve cells have no companion cells.
Mention the type of epithelium seen in the alveoli of lungs.
Name the different cell junctions found in tissues.
How does a gap junction facilitate intercellular communication?
Classify and describe epithelial tissue on the basis of structural modifications of cells.
