Simple squamous Epithelium
Location: Kidney glomeruli; air sacs of lungs; lining of heart and blood vessels; lining of ventral body cavity (serosae)
Function: A single layer of flattened cells makes up simple squamous epithelia. This type of epithelia lines the inner surface of all blood vessels (endothelium), forms the lung’s alveolar sac wall, and lines body cavities (mesothelium). The basic purpose of simple squamous epithelia is to allow gases and tiny molecules to diffuse
Simple Cuboidal Epithelium
Location: Kidney tubules; ducts of small glands; ovary surface
Function: Simple cuboidal epithelium consist of a single layer of cells that are approximately as tall as they are wide. This type of epithelium lines collecting ducts and tubes and is involved in absorbing or secreting material into the ducts or tubes.
Simple Columnar Epithelium
Location: Nonciliated type lines most of the digestive tract (stomach to rectum) and gallbladder
Ciliated variety lines small bronchi and uterine tubes
Function: A single layer of cells that are taller than they are wide makes up simple columnar epithelium. This form of epithelia lines the small intestine, where it collects nutrients from the lumen. Simple columnar epithelia are also seen in the stomach, where acid, digestive enzymes, and mucous are secreted.
Stratified Squamous Epithelium
Location: Nonkeratinized type forms the moist linings of the esophagus, mouth, and vagina. Keratinized variety forms the epidermis of the skin, a dry membrane
Function: Multiple layers of cells make up stratified squamous epithelia, with the outermost layer being squamous. The other layers may contain cuboidal and/or columnar cells, but the epithelium is classified only by the shape of the cells in the topmost layer. This form of epithelium is prevalent in the skin and protects it from mechanical stress and desiccation.
Stratified Cuboidal Epithelium
Location: This type of epithelium is not as common and is found in the excretory ducts of your salivary and sweat glands.
Function: Stratified cuboidal epithelium is a form of epithelial tissue found mostly in glands, where the gland specializes in selective absorption and release into blood or lymph arteries. Stratified cuboidal epithelium enables glands and organs to build a barrier between the functioning cells of an organ or gland and the arteries that supply it.
Stratified Columnar
Location: It is found in the conjunctiva, pharynx, anus, and male urethra
Function: The excretory system’s stratified columnar epithelium and glands fulfill the role of secreting waste materials into the ducts and out of the body. Similarly, mucus is secreted by the columnar epithelium in the conjunctiva of the eyes to keep the eyes moist and clean.
Pseudostratified Columnar
Location: Nonciliated type in ducts of large glands, parts of male urethra. Ciliated variety lines the trachea, most of the upper respiratory tract
Function: The absorption and secretion of mucus, protection from external particles (dust, viruses, and allergies), and transport of molecules such as hormones and enzymes are all functions of pseudostratified columnar epithelium.
Transitional Epithelium
Location: Lines the ureters, urinary bladder, and part of the urethra
Function: The urinary tract’s transitional epithelium is bordered by a layer of glycosaminoglycans (GAGs), which serve to prevent microbial and crystal adherence to the bladder epithelium and to reduce the passage of urine solutes and proteins through the bladder epithelium.
Simple squamous Epithelium
Location: Kidney glomeruli; air sacs of lungs; lining of heart and blood vessels; lining of ventral body cavity (serosae)
Function: A single layer of flattened cells makes up simple squamous epithelia. This type of epithelia lines the inner surface of all blood vessels (endothelium), forms the lung’s alveolar sac wall, and lines body cavities (mesothelium). The basic purpose of simple squamous epithelia is to allow gases and tiny molecules to diffuse
Simple Cuboidal Epithelium
Location: Kidney tubules; ducts of small glands; ovary surface
Function: Simple cuboidal epithelium consist of a single layer of cells that are approximately as tall as they are wide. This type of epithelium lines collecting ducts and tubes and is involved in absorbing or secreting material into the ducts or tubes.
Simple Columnar Epithelium
Location: Nonciliated type lines most of the digestive tract (stomach to rectum) and gallbladder
Ciliated variety lines small bronchi and uterine tubes
Function: A single layer of cells that are taller than they are wide makes up simple columnar epithelium. This form of epithelia lines the small intestine, where it collects nutrients from the lumen. Simple columnar epithelia are also seen in the stomach, where acid, digestive enzymes, and mucous are secreted.
Stratified Squamous Epithelium
Location: Nonkeratinized type forms the moist linings of the esophagus, mouth, and vagina. Keratinized variety forms the epidermis of the skin, a dry membrane
Function: Multiple layers of cells make up stratified squamous epithelia, with the outermost layer being squamous. The other layers may contain cuboidal and/or columnar cells, but the epithelium is classified only by the shape of the cells in the topmost layer. This form of epithelium is prevalent in the skin and protects it from mechanical stress and desiccation.
Stratified Cuboidal Epithelium
Location: This type of epithelium is not as common and is found in the excretory ducts of your salivary and sweat glands.
Function: Stratified cuboidal epithelium is a form of epithelial tissue found mostly in glands, where the gland specializes in selective absorption and release into blood or lymph arteries. Stratified cuboidal epithelium enables glands and organs to build a barrier between the functioning cells of an organ or gland and the arteries that supply it.
Stratified Columnar
Location: It is found in the conjunctiva, pharynx, anus, and male urethra
Function: The excretory system’s stratified columnar epithelium and glands fulfill the role of secreting waste materials into the ducts and out of the body. Similarly, mucus is secreted by the columnar epithelium in the conjunctiva of the eyes to keep the eyes moist and clean.
Pseudostratified Columnar
Location: Nonciliated type in ducts of large glands, parts of male urethra. Ciliated variety lines the trachea, most of the upper respiratory tract
Function: The absorption and secretion of mucus, protection from external particles (dust, viruses, and allergies), and transport of molecules such as hormones and enzymes are all functions of pseudostratified columnar epithelium.
Transitional Epithelium
Location: Lines the ureters, urinary bladder, and part of the urethra
Function: The urinary tract’s transitional epithelium is bordered by a layer of glycosaminoglycans (GAGs), which serve to prevent microbial and crystal adherence to the bladder epithelium and to reduce the passage of urine solutes and proteins through the bladder epithelium.