| primitive pit | The depression in the primitive node that serves to connect the notochordal canal with the surface ectoderm and the yolk sac. These connections are referred to as the neurenteric canal. (05 Mar 2000) |
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| primitive reticular cell | A cell with processes making contact with those of other similar cell's to form a cellular network; along with the network of reticular fibres, the reticular cell's form the stroma of bone marrow and lymphatic tissues. (05 Mar 2000) |
| primitive ridge | One of the paired ridge's on either side of the primitive groove. (05 Mar 2000) |
| primitive streak | An ectodermal ridge in the midline at the caudal end of the embryonic disk from which arises the intraembryonic mesoderm; achieved by inward and then lateral migration of cells; in human embryos, it appears on day 15 and gives a cephalocaudal axis to the developing embryo. Synonym: germinal streak. (05 Mar 2000) |
| primitive |
Existing in a simple or early form; showing little evolution.
출처: dictionary.rare-cancer.org/dictionary.php
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| primitive |
Phyolgenetically old part of the cerebellum represented by the anterior lobe in man. It is concerned with regulation of muscle tone.
출처: www.umanitoba.ca/faculties/medicine/anatomy/neuro/...
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| primitive streak |
This develops in an embryo at about day 14 when the cells separate into 2 groups: those that will eventually become a foetus; and those which will form the placenta and umbilical cord.
출처: www.hc-sc.gc.ca/english/media/releases/2002/2002_3...
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| primitive |
retaining many ancestral characteristics
출처: www.amonline.net.au/spiders/resources/terms.htm
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| primitive streak |
Thickening in surface of embryos which results in the first clearly recognisable stage in embryonic development.
출처: www.hfea.gov.uk/Glossary
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