placode वाक्य
उदाहरण वाक्य
मोबाइल
- As development progresses, the lens placode begins to deepen and invaginate.
- The second stage occurs at E11.5 when placode formation begins along the mammary milk line.
- During development, primitive olfactory neurons extend their axons from the olfactory placode, through the mesenchyme, towards the telencephalic vesicle.
- In chick embryos it is shown that ectopically expressed noggin produces enlarged follicles, and BMP4 signaling shows repressed placode fate in nearby cells.
- Derived from the embryonic nasal placode, the olfactory nerve is somewhat unique among cranial nerves because it is capable of some regeneration if damaged.
- As the placode continues to deepen, the opening to the surface ectoderm constricts and the lens cells forms a structure known as the lens vesicle.
- Lastly, the third stage occurs at E12.5 and involves the invagination of cells within the placode into the mesenchyme, leading to a mammary anlage ( biology ).
- The optic visicle will then induce the ectoderm that thickens ( lens placode ) and further invaginates to a point that detaches from the ectoderm and forms a neurogenic placode by itself.
- The optic visicle will then induce the ectoderm that thickens ( lens placode ) and further invaginates to a point that detaches from the ectoderm and forms a neurogenic placode by itself.
- The term " neurogenic placode " generally refers to cranial placodes that have neurogenic potential-i . e . those that give rise to neurons associated with the special senses and cranial ganglia.
- A mammary crest usually stops growing at 8 weeks and its length is regressed starting at the caudal end and extending cranially, so that what remains is a round, ectodermic placode where the axilla develops.
- During the invagination of the optic cup, the ectoderm begins to thicken and form the lens placode, which eventually separates from the ectoderm to form the lens vesicle at the open end of the optic cup.
- The GnRH neurones originate in an area of the developing brain called the olfactory placode; they then pass through the cribriform plate and into a structure called the olfactory bulb, where the sense of smell is generated.
- The lens placode is affected by the chordamesoderm making it to invaginate and forms the optic cup composed by an outer layer of neural retina and inner layer the pigmented retina that will unite and form the optic stalk.
- The term " placode " or " ectodermal placode " is sometimes used to refer specifically to cranial or neurogenic placodes, but is also used for areas of the ectoderm that give rise to structures such as mammary glands, feathers and hair.
- The term " placode " or " ectodermal placode " is sometimes used to refer specifically to cranial or neurogenic placodes, but is also used for areas of the ectoderm that give rise to structures such as mammary glands, feathers and hair.
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