作者qzpm (左上左下右上右下)
看板pet
標題Re: [問題]肛門啊肛門 你真是個神奇的東西
時間Fri Aug 31 20:38:02 2007
Anal Glands (Sacs)
Veterinary & Aquatic Services Department, Drs. Foster & Smith, Inc.
Location and function of anal glands
As the dog or cat is viewed from behind, anal glands (also called anal sacs)
are located on each side of and slightly below the anal opening, at the 4
o'clock and 8 o'clock positions. A tiny duct or tube leads under the skin to an
opening directly beside the anus.
All predators, whether they are canines or felines in the wild or skunks in
your backyard, have anal glands. They just use them differently. Skunks
discharge the secretion from these glands as a form of defense, while dogs use
it primarily for territorial marking or as a form of communication. In dogs and
cats, every time a stool is passed, it should put enough pressure on the anal
glands that some of the secretion is deposited on the surface of the stool.
Other dogs and cats are then able to tell who has been in the neighborhood,
just by sniffing the stools they find. Additionally, dogs and cats recognize
each other by smelling each other in the general area of the anus, since each
animal's anal glands produce a unique scent.
Reference:
http://www.peteducation.com/article.cfm?cls=2&cat=1571&articleid=510
簡單的說,就是拿來標記氣味,犬貓都有這樣的功能,可以用來區分地域性。
一般在大便時肌肉的收縮,會導致肛門腺的分泌物沾附在糞便上,來達到標記的功能。
在臭鼬的應用上就比較不同,主要拿來防禦。
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1F:→ qzpm:除此之外還有圍肛腺(Circumanal gland),一種內分泌腺。功能 08/31 20:42
2F:→ qzpm:不明。圍肛腺瘤是最常被討論的病變。 08/31 20:42
3F:→ qzpm:如果肛門腺不定期清理,會發生膿瘍甚至破裂。造成感染劇痛。 08/31 20:45
4F:→ qzpm:上上面那句改成"圍肛腺瘤是圍肛腺中最常被討論的病變"才對。 08/31 20:47
5F:→ qzpm:太久沒擠,動物會有坐在地上,屁股拖地滑行的滑稽動作。當然 08/31 20:49
6F:→ qzpm:這樣的動作也有可能是寄生蟲感染所造成。 08/31 20:50
7F:→ qzpm:另外高纖維的飲食,可增大糞便體積,有助於肛門腺分泌。 08/31 21:03