Question

Classify simple epithelial tissue on the basis of the structural modification of the cells. Where do we find ciliated epithelium in the human body? Differentiate between Endocrine gland and Exocrine gland.

Answer 1

Hint: Epithelial tissues can be found all over the body. They cover all body surfaces, line body cavities and hollow organs, and make up the bulk of gland tissue. Protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception are only a few of the functions they perform.

Complete answer:
A single layer of cells makes up a simple epithelium. They're where absorption, secretion, and filtration usually happen. These processes are aided by the epithelial barrier's thinness.
The shape of the cells in simple epithelial tissues is used to classify them. Simple epithelium is divided into four types: 1) simple squamous; 2) simple cuboidal; 3) simple columnar; and 4) pseudostratified.
The trachea, bronchi of the lungs, portions of the nasal cavities, the female uterus and oviduct, and the male vas deferens and epididymis are all lined with ciliated epithelium.
Endocrine glands are endocrine system ductless glands that secrete hormones directly into the bloodstream. The pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus, and adrenal glands are the main glands of the endocrine system.
Exocrine glands are glands that secrete substances through a duct onto an epithelial surface. Sweat, salivary, mammary, ceruminous, lacrimal, sebaceous, prostate, and mucous glands are examples of exocrine glands.

Note:
The cells of the simple squamous epithelium are smooth and arranged in a single layer. This single layer is thin enough to form a membrane through which compounds can diffuse passively.
Simple cuboidal epithelium is made up of cells that are as tall as they are deep in a single layer. Secretion and absorption are two essential functions of the basic cuboidal epithelium.
Simple Columnar is a single row of tall, tightly packed cells arranged in a row is a simple columnar epithelium. These cells can be located in areas with a high secretory role or in absorptive areas.
When simple columnar epithelial cells are shown in cross section, their nuclei appear at different heights, giving the misleading (hence pseudo) idea that the epithelium is stratified. Hence known as pseudostratified.