Tissue Unit - Epithelial Flashcards
Location: ONLY found in the lining of the upper respiratory tract (trachea, bronchi, bronchioles)
Posedstratified (false) Columnar Structure: looks like more than one layer, but it’s not (look at nuclei), nuclei not on bottom, have cilia and goblet cells Function: sweeps debris out of lungs, goblet cells produce mucin, histamine (increase goblet cell activity)
Location: Not located very many places -vas deferents (male reproduction) -parts of pharynx -junction distal esophagus and cardiac sphincter
Stratified Columnar Structure: consists of several layers of columnar cells
Location: -lines all blood vessels -lines the inside of the heart -lines the wall of capillaries and are responsible for feeding tissue and alveoli
Simple Squamous Structure: single layer of thin, flattened cells Function: well suited for diffusion (very thin/permeable/very slick)
Location: urinary bladder
Transitional Epithelium -Designed to distend and return to it’s normal size -Transitions from cuboidal to squamous
Location: mammary gland, sweat glands, salivary glands, and pancreas (larger glands)
Stratified Cubodial Structure: two or three layers of cuboidal cells lining an opening of layer (endocrine) glands Function: several layers of cells provide greater protection than one single layer; SECRETION
Location: kidney tubules and ducts of some glands (salivary, thyroid, pancreas, liver) and glands
Simple Cuboidal Structure: single layer of cube-shaped cells with centrally located nuclei Function: secretion (glands) and sometimes absorption (places with microvilli)
Location: makes up outer layer of skin and lines the mouth, throat, vagina, and anal canal
Stratified Squamous Structure: flattened layers of cells Function: body’s wear and tear tissue; made to take lots of low energy friction, exposure to the environment, protect us from fluid loss and invasion
Location: line uterus/Fallopian tubes, stomach, and intestines
Simple Columnar Structure: elongated cells, nuclei are all located near the basement membrane, often have microvilli or cilia Function: absorption and cilia help move things
