Gland
as gland (lat. glandula) in anatomy an organ is designated, which forms a special substance and these as secretion outward, or as hormone directly into the bloodstream separates.
Glands can be divided on the basis of different criteria (see Web left). Above definitionthe presence of a remark course presupposes as distinction criterion. Across these the secretion is led to the surface of the skin or a mucous membrane. These glands are thus called exokrine glands. The emergence of the remark course explains itself from the fact that these glands in its embryonalenDeveloping history were shifted by the surface of the epithelium into the depth and to organs with for these typical specialized epithelium cells to have differentiated there , however with the original epithelium surface in connection remained themselves.
To table of contents |
Exokrine one
Exokrine glands differentiates glands according to the kind of its secretion delivery:
Merokrine glands (in former times: ekkrine glands) (cells remain intact after the secretion):
serous glands produce a highly liquid, enzymhaltiges secretion
- Parotis (ear salivary gland)
- Pankreas (pancreas)
- Brunner' gland (12-Finger intestine)
muköse glands produce viscous, slimySecretion
- gland at the cervix
- glands in the throat area and at the Zungenwurzel
- Cowper' gland (to männl. Serous produce
urethra) mixed glands od. depending upon need muköse eliminations
- cup cells of the respiratory system
- Unterkiefer-und Unterzungenspeicheldrüse
Apokrine glands (a majority of the gland cells as secretion one pushes off):
- Smell glands (shoulder cave)
- milk glandsweibl. Chest
Holokrine glands (cells go with the secretion at the basis so that the cell body as secretion turns into; constant new formation is)
- tallow gland
Endokrine glands
in contrast to it glands without remark course as hormone glands or endokrine glands is necessarily designated. These give their active substances(Hormones) directly in the blood off. The whole of these glands is called Endokrines system.
