Tissues (Anatomy) Flashcards
what are tissues
many cells that are similar in structure and share functions
what are the 4 major types of tissue and what do they do
Epithelium – covering/lining
Connective – support/ protection
Muscle – movement (not going to spend a lot of time rn)
Nervous – control/communication(not going to spend a lot of time rn)
what are the two types of epithelial tissues (based on location)
Covering and lining epithelia–> On external and internal surfaces
-Glandular epithelia–> (glands are created by epithelial)
Describe the Apical surface of epithelial tissue
-towards the lumen
– microvilli (e.g., brush border of the intestinal lining)
– cilia (e.g., lining of trachea)
Has things coming off of it
-cells have polarity
describe the basal surface of epithelial tissue
– secrete basal lamina: Noncellular, glycoprotein, collagen
The bottom of tissue or the cell and it is always going to be attached
describe the continuous sheets of closely packed cells
tight junctions, desmosomes
what is epithelial tissue supported by
Supported by a connective tissue reticular lamina (under the basal lamina). Reticular & Basal = basement membrane
does epithelial tissue have blood flow and is it inervated
-it does not have blood flow because it is not vasculature
-it is innervated
explain the regeneration of epithelial tissue
-high rate of regeneration
-it goes through mitosis quickly (cancer can also be bc of quick mitosis )
where do you find squamous epithelium and what is the functions of it
-skin
-lungs
-mouth
-found in places where we need a gas exchange (like the lungs) or things need to pass
where do you find cuboidal epithelium and what is the function of it
-kidney
-glands
-ovaries
-synonymous with glands or filtration systems
where do you find columnar epithelium and what is the function of it
-larynx
-digestive tract
where is stratified squamous epithelium
-where there is friction or constant touching like the oral cavity and our own skin
what is a gland
epithelial tissues specialized to synthesize and secrete a product
what is a gland classified by
-the site of product release (exocrine or endocrine)
-relatice number of cells forming the gland (unicellular (e.g. goblet cells, that secrete mucus)
-multicellular
what are exocrine glands
(outside or outward) - hollow organ or duct; the action of the product is local
Salivary, mucous, sweat, oil glands
what are endocrine glands
(within) blood stream; travels great distance to target
Pituitary gland, ovary, testes
what do membranes consist of
epithelial tissue and connective tissue; therefore, are simple organs
what are membranes and list them
-Membranes are simple organs
-Cutaneous Membrane
-Mucous Membranes
-Serous Membranes