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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
Describe various types of epithelial tissues with the help of labelled diagrams
Distinguish between Simple epithelium and compound epithelium
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Simple squamous epithelium is present in respiratory tract.
How many types of epithelial tissues have you studied? Write their functions.
Name the tissues found:
at the inner lining of the trachea.
Lining of small intestine is made up of ______.
State whether true or false. If false, correct the statement.
Epithelial tissue is protective tissue in animal body.
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
Differentiate between sclerenchyma and parenchyma tissues. Draw well labelled diagram.
Describe the structure and function of different types of epithelial tissues. Draw diagram of each type of epithelial tissue.
Give reasons for
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
An epithelial layer does not allow the regulation of materials between the body and the external environment.
Write one point of difference between
Simple and compound epithelial tissue.
Explain simple epithelium and its types.
Identify the types of cell junctions that help to stop the leakage of the substances across tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.
Stratified epithelial cells have limited role in secretion. Justify their role in our skin.
