- columnar layer
- mantle l.
Medical dictionary. 2011.
columnar layer
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Columnar — In biology, columnar refers to the shape of epithelial cells that are taller than they are wide.[1] Form follows function in biology, and columnar morphorphology hints at the functions of the cell. Columnar cells are important in absorption and… … Wikipedia
layer — A sheet of one substance lying on another and distinguished from it by a difference in texture or color or by not being continuous with it. SEE ALSO: stratum, lamina. SYN: panniculus. ameloblastic l. the internal l. of the enamel organ. SYN: enam … Medical dictionary
columnar epithelium — noun : epithelium consisting of or having the superficial layer composed of tall narrow somewhat cylindrical or prismatic cells and occurring in man chiefly in the digestive tract from the esophageal end of the stomach to the anus and in various… … Useful english dictionary
Pseudostratified columnar epithelium — Transverse section of tracheal tissue. Note that image is incorrectly labeled ciliated stratified epithelium at upper right. Code TH … Wikipedia
Ozone layer — The ozone layer is a layer in Earth s atmosphere which contains relatively high concentrations of ozone (O3). This layer absorbs 97–99% of the Sun s high frequency ultraviolet light, which is potentially damaging to the life forms on Earth.[1] It … Wikipedia
Germ layer — [ http://www.ncbi.nih.gov/About/primer/genetics cell.html NCBI] .] A germ layer is a collection of cells, formed during animal embryogenesis. Germ layers are particularly pronounced in the vertebrates; however, all animals more complex than… … Wikipedia
palisade layer — noun Date: 1914 a layer of columnar cells rich in chloroplasts found beneath the upper epidermis of foliage leaves called also palisade mesophyll, palisade parenchyma, palisade tissue compare spongy parenchyma … New Collegiate Dictionary
primary shell layer — (BRACHIOPODA) Outer layer under the periostracum; deposited by columnar epithelium of the outer mantle lobe … Dictionary of invertebrate zoology
cuticular layer — a striate border of modified cytoplasm at the free end of some columnar cells … Medical dictionary
stratum — One of the layers of differentiated tissue, the aggregate of which forms any given structure, such as the retina or the skin. SEE ALSO: lamina, layer. [L. sterno, pp. stratus, to spread out, strew, ntr. of pp. as noun, s., a bed cover, layer] s.… … Medical dictionary
