Pouch

In biologv, a sac, cecum, diverticulum or bag-like structure. P. -bone, a marsupial bone. P. -corona, the coronal intestine of Medusa. Same as Canal, Corona. P. of Douglas, the cul-de-sac of Douglas, a pouch formed by the recto-uterine fold of the peritoneum. P. of Fabric i us. See Bursa fabric i i. P. -gestation, gestation in a pouch, as in marsupials. P. -gill, one of the gills of the lamprey, or marsipobranchs. P., Guttural, in biology, one of the large mucous bags in solipeds situated between the atlas and the anterior portion of the pharynx and larynx. P., Hair, the depre ion in the skin in which the hair grows. Ps., Ileo-cecal. narrow-necked folds of the peritoneum, at the termination of the ileum. P., Inguinal, a fold of the peritoneum behind the internal abdominal ring. P., Laryngeal, a blind pouch of mucosa opening into the ventral part of the ventricle of the larynx. P., Marsupial; in marsupials, the bag on the anterior abdominal wall in which the young are carried. P., Needham's, in biology, an enlargement or cecal diverticulum of the seminal duct of a cephalopod. P., Para rectal, the lateral portion of Douglas's pouch. P., Para vesical, the para vesical fo a. P. of Rathke, the diverticulum from the pharynx in the embryo, which goes to form the anterior portion of the Rectal, of sharks and rays, a vascular and glandular dorsal diverticulum of the rectum, which Wilder thinks may represent the allantois of higher vertebrates. P., Recto-uterine, a pouch-like fold of the peritoneum that is reflected over the uterus. P., Recto-vaginal. Same as P., Recto-uterine. P., Recto vesical, the pouch of the peritoneum that is reflected on the bladder. P., of Seesel, a pouch in the embryo behind the summit of the hypophysis. P., Subcecal, a fold of the peritoneum behind and below the cecum. P. of the Tympanic Membrane, folds of mucosa around the horizontal portion of the chorda tympani nerve as it pa es through the tympanic cavity. P., Utero-vesical, P., Vesico-uterine, a pouch of peritoneum situated between the uterus and the bladder.