From: owner-ammf-digest@smoe.org (alt.music.moxy-fruvous digest) To: ammf-digest@smoe.org Subject: alt.music.moxy-fruvous digest V14 #4965 Reply-To: ammf@fruvous.com Sender: owner-ammf-digest@smoe.org Errors-To: owner-ammf-digest@smoe.org Precedence: bulk alt.music.moxy-fruvous digest Tuesday, September 15 2020 Volume 14 : Number 4965 Today's Subjects: ----------------- Enjoy Your Safe Date with Ukrainian Beauties ["See Love Live" Subject: Enjoy Your Safe Date with Ukrainian Beauties Enjoy Your Safe Date with Ukrainian Beauties http://detoxfoot.buzz/oZT1OOm0-uOXNtxfxaTOl5Bo_IH5lqbUT1R9RyL2mqI-Coom http://detoxfoot.buzz/nL51-5dGoqUtd53lOsonEW4rkIlm7i5l7ko22K69HEg92Nux thers are among the most complex integumentary appendages found in vertebrates and are formed in tiny follicles in the epidermis, or outer skin layer, that produce keratin proteins. The ?-keratins in feathers, beaks and claws b and the claws, scales and shells of reptiles b are composed of protein strands hydrogen-bonded into ?-pleated sheets, which are then further twisted and crosslinked by disulfide bridges into structures even tougher than the ?-keratins of mammalian hair, horns and hooves. The exact signals that induce the growth of feathers on the skin are not known, but it has been found that the transcription factor cDermo-1 induces the growth of feathers on skin and scales on the leg. Feather microstructure showing interlocking barbules Classification See also: Flight feather and Down feather There are two basic types of feather: vaned feathers which cover the exterior of the body, and down feathers which are underneath the vaned feathers. The pennaceous feathers are vaned feathers. Also called contour feathers, pennaceous feathers arise from tracts and cover the entire body. A third rarer type of feather, the filoplume, is hairlike and (if present in a bird; they are entirely absent in ratites) are closely associated with pennaceous feathers and are often entirely hidden by them, with one or two filoplumes attached and sprouting from near the same point of the skin as each pennaceous feather, at least on a bird's head, neck and trunk. In some passerines, filoplumes arise exposed beyond the pennaceous feathers on the neck. The remiges, or flight feathers of the wing, and rectrices, or flight feathers of the tail, are the most important feathers for flight. A typical vaned feather features a main shaft, called the rachis. Fused to the rachis are a series of branches, or barbs; the barbs themselves are also branched and form the barbules. These barbules have minute hooks called barbicels for cross-attachment. Down feathers are fluffy because they lack barbicels, so the barbules float free of each other, allowing the down to trap air and provide excellent thermal insulation. At the base of the feather, the rachis expands to form the hollow tubular calamus (or quill) which inserts into a follicle in the skin. The basal part of the calamus is without vanes. This part is embedded within the skin follicle and has an opening at the base (proximal umbilicus) and a small opening on the side (distal umbilicus). Hatchling birds of some species have a special kind of natal down feathers (neossoptiles) wh ------------------------------ End of alt.music.moxy-fruvous digest V14 #4965 **********************************************