Epithelial Tissue Flashcards
What does keratinized stratified squamous epithelia form?
Surface of the skin
What does non keratinized stratified squamous epithelia form?
Lining of mouth, anus, and vagina
What does simple cuboidal epithelia form?
Portions of kidney tubules; also found in various glands and ducts
Where is stratified cuboidal epithelia?
Lining if some ducts. Rare
Where is transitional epithelia?
Urinary bladder, renal pelvis, and ureters
Where is simple columnar epithelia?
Stomach, intestinal lining, and many excretory ducts
Where is pseudostratified ciliated columnar epithelia?
Trachea, nasopharynx, bronchi, and portions of male reproductive tract. Possess cilia
Where is stratified columnar epithelia?
Ducts of salivary glands, small areas of the pharynx, epiglottis, anus, mammary glands, and urethra
What are functions of simple squamous epithelium?
Reduce friction, control permeability, perform absorption and secretion
What are functions of simple cuboidal epithelia?
Diffusion and limited protection
What are functions of simple columnar epithelium?
Secretion, absorption, protection
What are functions of stratified squamous epithelium?
Protection where mechanical stresses are severe
What are functions of stratified cuboidal epithelium?
Protection, secretion, and absorption
What are functions of stratified columnar epithelium?
Protection
Serous glands
Secrete a watery solution that usually contains enzymes, such as salivary amylase in saliva
Mucous gland
Exocrine gland that secretes mucins which absorb water to form slippery mucus, such as those in saliva
Mixed exocrine glands
Contain more than one type of gland cell and may produce two different exocrine secretions (could be serous or mucous)
How endocrine glands release their secretions?
Exocytosis from the gland cells into the fluid surrounding the cell
Unicellular glands
Individual secretory cells that secrete mucins. There are two types goblet and mucous cells
Where are mucous cells found and where are they?
Unicellular gland cells that are found in pseudostratified ciliated epithelia.
Where are goblet cells and what are they?
Unicellular gland cells. They are scattered among simple columnar epithelium of the small and large intestine
Secretory sheet
Simplest multicellular exocrine gland. Glandular cells dominate the epithelium and release their secretions into an inner compartment
What is an example of a secretory sheet?
Mucus secreting cells in the stomach
What’s an example of a simple tubular gland
Intestinal glands. Multicellular
What is an example of simple coiled tubular gland?
Merocrine sweat glands
What are examples of simple branched tubular glands?
Gastric glands, mucous glands of esophagus, tongue, and duodenum
What is an example of a simple alveolar gland?
Not found in adults but is a stage in development of simple branched glands
What is an example of a simple branched alveolar gland?
Sebaceous glands
What is an example of a compound tubular gland?
Mucous glands (in oral cavity), bulbo-urethral glands (male reproductive system), testes (seminiferous tubules)
What is an example of a compound alveolar gland?
Mammary glands
What is an example of compound tubuloalveolar gland?
Salivary glands, glands of respiratory passages, pancreas
Merocrine secretion
Method of glandular epithelial cell secretion. Exocytosis puts products onto surface of the cell. Ex: serous cells of salivary glands
Apocrine secretion
Method of glandular epithelial cell secretion in which the cytoplasm is shed. Ex: Lactiferous cells of the mammary gland
Holocrine secretion
Type of glandular epithelial cell secretion. Destroys gland cell by build up of secretory product (ex: sebaceous gland cells)
What structures does simple squamous epithelia form?
Alveoli of the lung, inner lining of the cornea of the eye, mesothelial lining of ventral body cavities, and endothelial lining of blood vessels
