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Question
How many types of epithelial tissues have you studied? Write their functions.
Solution
There are two main types of epithelial tissues. These are:
(a) Simple and
(b) Compound
Simple epithelial tissue is further divided into six sub-groups which are:
(i) Columnar epithelium
(ii) Ciliated epithelium
(iii) Cuboidal epithelium
(iv) Squamous epithelium
(v) Glandular epithelium
(vi) Sensory epithelium
Compound epithelial tissue is of two types:
(i) Stratified epithelium
(ii) Transitional epithelium
Functions of epithelial tissue are:
(i) It forms a protective layer over the body and protects the underlying cells from drying up, injury, germs and harmful chemicals.
(ii) It absorbs water and other nutrients inside the body.
(iii) Some of these cells secrete ear wax, mucus, milk and digestive juices.
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RELATED QUESTIONS
Based on the following information, identify the three types of epithelial tissue in the figures given below :
| a |  |
b |  |
c |  |
(1) Cuboidal epithelium: It consists of a single layer of cuboidal cells.
(2) Columnar epithelium: It is composed of tall, cylindrical cells with oval nuclei usually placed at the base of the cells.
(3) Ciliated epithelium: It consists of cells being hair-like cilia on their free surface.
Name one place in living organisms where the following tissues is located:
Squamous epithelium
Answer the following question.
Describe different types of cell junctions.
The main function of the cuboidal epithelium is
What is an epithelium? Enumerate the characteristic features of different epithelia.
Nerve cell does not contain
The dead element present in the phloem is
Write true (T) or false (F)
Epithelial layer does not allow regulation of materials between body and external environment.
Differentiate between sclerenchyma and parenchyma tissues. Draw well labelled diagram.
Write one point of difference between
Simple and compound epithelial tissue.
