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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
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Glandular epithelium is present in kidneys.
Name one place in living organisms where the following tissue is located:
Ciliated epithelium
Name the kind of cells found in the following place:
Inner lining of the wind pipe
Name any one body part where ciliated epithelium is found in humans. What is its function?
Name the tissues found:
in the testes and ovaries.
Answer the following question.
Describe different types of cell junctions.
Prevention of substances from leaking across the tissue is provided by ______.
Some epithelia are pseudostratified. What does this mean?
If a potted plant is covered with a glass jar, water vapours appear on the wall of glass jar. Explain why?
Write true (T) or false (F)
Epithelial layer is permeable layer.
Glandular epithelium gives a stratified appearance.
Explain simple epithelium and its types.
Epithelium founds in the lining of stomach and intestine is
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.
Write the appropriate type of tissues in column B according to the functions mentioned in column A.
| Column A | Column B |
| a. Secretion and absorption | i. ______ |
| b. Protective covering | ii. ______ |
| c. Linking and supporting framework | iii. ______ |
