Question

what is epithelial tissue? with an example.

Answer 1

Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. Epithelial tissues line the cavities and surfaces of blood vessels and organs throughout the body. There are three principal shapes of epithelialcells —squamous, columnar and cuboidal.

Answer 2

Answer:

This is the tissue that lines, covers and generally organizes the body are epithelial tissues.

General characteristics and functions of epithelial tissues:

• Epithelial tissues line the cavities and surfaces of blood vessels and lymphatic vessels and organs throughout the body.

• The cells in epithelial tissue are closely packed together and have very little space between them.

• This tissue acts as a barrier.

• It protects our body parts, internally and externally from damage and dehydration.

• Epithelial tissue also helps to protect us from microorganisms.

• Epithelial tissue functions to absorb, secrete, and excrete substances according to the need of the body part that it covers.

Types of epithelial tissues:

Based on their shape, epithelial tissues are divided into seven types.

1. Simple squamous epithelium

2. Simple cuboidal epithelium

3. Simple columnar epithelium

4. Stratified squamous epithelium

5. Stratified cuboidal epithelium

6. Stratified columnar epithelium

7. Ciliated epithelium

8. Specialized functions of the Epithelial tissue:

The epithelial tissue does the following extra functions based on its location:

• In the intestines, it absorbs nutrients.

• Epithelial tissue in the endocrine glands like thyroid glands secretes hormones.

• Epithelial tissues in the kidneys excrete waste products and in the sweat glands excrete sweat.

• Ciliated epithelial tissue can be found in areas such as the respiratory tract.
• Cilia are hair-like protrusions that help to move substances, such as dust particles in the proper direction.