limb bud


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bud

 [bud]
1. a structure on a plant, often round, that encloses an undeveloped flower or leaf.
2. something resembling the bud of a plant, especially a protuberance in the embryo from which an organ or part develops.
end bud the remnant of the embryonic primitive knot, from which arises the caudal part of the trunk.
limb bud one of the four lateral swellings appearing in vertebrate embryos, which develop into the two pairs of limbs.
tail bud
the primordium of the caudal appendage.
taste b's end organs of the gustatory nerve containing the receptor surfaces for the sense of taste.
ureteric bud a dorsal outgrowth of the mesonephric duct near its entry into the cloaca; it is the primordium of the ureter, renal pelvis, calices, and collecting tubules of the kidneys.
bud of urethra bulb of urethra.

limb bud

an ectodermally covered mesenchymal outgrowth on the embryonic flank giving rise to either the forelimb or hindlimb.

limb bud

(lim bŭd)
An ectodermally covered mesenchymal outgrowth from the embryonic trunk giving rise to either the upper limb or lower limb.

bud

a structure resembling the bud of a plant, especially a protuberance in the embryo from which an organ or part develops.

end bud
the remnant of the embryonic primitive knot, from which arises the tail and caudal part of the trunk.
horn bud
bilateral cranial protuberances, destined to develop to a fighting horn or antler stage.
limb bud
one of the four lateral swellings appearing in vertebrate embryos, which develop into the two pairs of limbs.
tail bud
1. the primordium of the caudal appendage.
2. end bud.
taste b's
end organs of the gustatory nerve containing the receptor surfaces for the sense of taste.
ureteric bud
an outgrowth of the mesonephric duct giving rise to all but the nephrons of the permanent kidney.
bud of urethra
bulb of urethra.
References in periodicals archive ?
Limb bud cell culture for in vitro teratogen screening: validation of an improved assessment method using 51 compounds.
5 mouse limb bud mesenchymal stem cells (MSCs) by enzymatic digestion of limb bud tissue as previously described (Zhang et al.
Autotomy of one or more of the primary (1[degrees]) limb regenerates (limb bud autotomy, or LBA) before a critical period interrupts proecdysis until secondary (2[degrees]) limb buds differentiate and grow to the approximate size of those lost (Holland and Skinner, 1976).
They found that grafts taken from an area of the chick-limb bud known to be important in development do not prompt untreated limb buds to make molecular receptors for retinoic acid.
The link between retinoic acid levelsand limb differentiation was first recognized in 1982, when researchers showed that they could induce the same type of mirror-image pattern by implanting retinoic-acid-soaked bits of paper into the front part of a limb bud.
During the fifth week of development, the mesoderm invades the upper limb bud to further condense in to ventral and dorsal muscle masses.
In the seventh week of Intra-uterine life the musculature of the limb is initially indicated as condensation of mesenchyme near the base of limb bud.
A team of six doctors at Civil Hospital in Gujarat removed the foetus - which not only had a spinal column, but also brain tissue, head, limb buds and an anal dimple.
There was some minor damage to limb buds (n=3) but their small size and position afforded them some protection.
The lesions begin during early intrauterine life when limb buds form, grow proportionately with the foetus and consequently affect large areas of trunk or extremity.
before the UVB exceeds the threshold or the chytrid fungus destroys our skin or trematodes further encyst in our limb buds or the meteor hits and the Earth is once more wrapped in a cloak of dust.