[136844] in SIPB IPv6
You'll lose nothing if you open it
daemon@ATHENA.MIT.EDU (Confirmation Needed)
Tue Mar 18 09:09:31 2025
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Date: Tue, 18 Mar 2025 14:09:29 +0100
From: "Confirmation Needed" <Congratulations@pianoforall.za.com>
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You'll lose nothing if you open it
http://pianoforall.za.com/54YhjXyjo9U55nJUfi2pgYDGMRiy-qeC8wd-Qn5dr7lJQ-3QyA
http://pianoforall.za.com/uZHHrCf_otLceinY13ON932fcWiyslkClvtGqJUDNqZVRuKwig
ead to the quadrate bone. The jaw muscles, which allow the bird to close its beak, attach to the proximal end of the lower mandible and to the bird's skull.(p148) The muscles that depress the lower mandible are usually weak, except in a few birds such as the starlings and the extinct huia, which have well-developed digastric muscles that aid in foraging by prying or gaping actions. In most birds, these muscles are relatively small as compared to the jaw muscles of similarly sized mammals.
Rhamphotheca
The outer surface of the beak consists of a thin sheath of keratin called the rhamphotheca,(p148) which can be subdivided into the rhinotheca of the upper mandible and the gnathotheca of the lower mandible.(p47) The covering arises from the Malpighian layer of the bird's epidermis,(p47) growing from plates at the base of each mandible. There is a vascular layer between the rhamphotheca and the deeper layers of the dermis, which is attached directly to the periosteum of the bones of the beak. The rhamphotheca grows continuously in most birds, and in some species, the color varies seasonally. In some alcids, such as the puffins, parts of the rhamphotheca are shed each year after the breeding season, while some pelicans shed a part of the bill called a "bill horn" that develops in the breeding season.
While most extant birds have a single seamless rhamphotheca, species in a few families, including the albatrosses(p47) and the emu, have compound rhamphothecae that consist of several pieces separated and defined by softer keratinous grooves. Studies have shown that this was the prim
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<div style="color:#FFFFFF;font-size:8px;">ead to the quadrate bone. The jaw muscles, which allow the bird to close its beak, attach to the proximal end of the lower mandible and to the bird's skull.(p148) The muscles that depress the lower mandible are usually weak, except in a few birds such as the starlings and the extinct huia, which have well-developed digastric muscles that aid in foraging by prying or gaping actions. In most birds, these muscles are relatively small as compared to the jaw muscles of similarly sized mammals. Rhamphotheca The outer surface of the beak consists of a thin sheath of keratin called the rhamphotheca,(p148) which can be subdivided into the rhinotheca of the upper mandible and the gnathotheca of the lower mandible.(p47) The covering arises from the Malpighian layer of the bird's epidermis,(p47) growing from plates at the base of each mandible. There is a vascular layer between the rhamphotheca and the deeper layers of the dermis, which is attached directly to the periosteum of the bones of the beak. The rhamphotheca grows continuously in most birds, and in some species, the color varies seasonally. In some alcids, such as the puffins, parts of the rhamphotheca are shed each year after the breeding season, while some pelicans shed a part of the bill called a "bill horn" that develops in the breeding season. While most extant birds have a single seamless rhamphotheca, species in a few families, including the albatrosses(p47) and the emu, have compound rhamphothecae that consist of several pieces separated and defined by softer keratinous grooves. Studies have shown that this was the prim</div>
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