Advertisements
Advertisements
प्रश्न
What is an epithelium? Enumerate the characteristic features of different epithelia.
Advertisements
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
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Simple squamous epithelium is present in respiratory tract.
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 tissues found
at the outer layer of skin.
Epithelial cells with cilia are found in ______ of our body.
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)
The lining of blood vessels, lung alveoli and kidney tubules are all made up of epithelial tissue.
Write true (T) or false (F)
Epithelial cells have a lot of intercellular spaces.
Differentiate between sclerenchyma and parenchyma tissues. Draw well labelled diagram.
Give reasons for
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
In a certain type of cell division, the diploid number of chromosomes is reduced to half. This kind of division occurs in ______.
The ______ epithelium is also known as the pavement membrane.
Stratified epithelial cells have limited role in secretion. Justify their role in our skin.
How does a gap junction facilitate intercellular communication?
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. ______ |
Classify and describe epithelial tissue on the basis of structural modifications of cells.
