what are epithelial tissue? how are they classified? their location and function?
Answers
Answer:
Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue.
Explanation:
Epithelial cells may be squamous, cuboidal, or columnar in shape and may be arranged in single or multiple layers.
The four major classes of simple epithelium are: 1) simple squamous; 2) simple cuboidal; 3) simple columnar; and 4) pseudostratified.
In general, epithelial tissues are classified by the number of their layers and by the shape and function of the cells.
In general, four functions may be attributed to epithelial tissues: (1) protection of the underlying tissues, (2) absorption, (3) secretion, and (4) reception of sensory stimuli.
Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands.
Answer:
Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands. They perform a variety of functions that include protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception.
The cells in epithelial tissue are tightly packed together with very little intercellular matrix. Because the tissues form coverings and linings, the cells have one free surface that is not in contact with other cells. Opposite the free surface, the cells are attached to underlying connective tissue by a non-cellular basement membrane. This membrane is a mixture of carbohydrates and proteins secreted by the epithelial and connective tissue cells.
Epithelial cells may be squamous, cuboidal, or columnar in shape and may be arranged in single or multiple layers.
Illustration of epithelial tissue
Simple cuboidal epithelium is found in glandular tissue and in the kidney tubules. Simple columnar epithelium lines the stomach and intestines. Pseudostratified columnar epithelium lines portions of the respiratory tract and some of the tubes of the male reproductive tract. Transitional epithelium can be distended or stretched. Glandular epithelium is specialized to produce and secrete substances.
I not know much so I think it's correct answer