Internal Anal Sphincter Innervation

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Other articles where Internal anal sphincter is discussed: anal canal: The internal sphincter is part of the inner surface of the canal; it is composed of concentric layers of circular muscle tissue and is not under voluntary control.

Chapter 37: The pelvic diaphragm and fascia Pelvic diaphragm. The pelvic diaphragm is a muscular partition formed by the levatores ani and coccygei, with which may be included the parietal pelvic fascia on their upper and lower aspects.

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Radiographic features Ultrasound. The corpus luteum is a thick walled cyst with characteristic “ring of fire” peripheral vascularity.It usually has a crenulated inner margin and internal echoes.

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Each nerve is covered externally by a dense sheath of connective tissue, the epineurium.Underlying this is a layer of flat cells, the perineurium, which forms a complete sleeve around a bundle of axons.

Chapter 36: The rectum and anal canal Rectum At the level of the middle of the sacrum, the sigmoid colon loses its mesentery and gradually becomes the rectum, which, at the upper limit of the pelvic diaphragm, ends in the anal canal (fig. 36-1).

Digestive System Melissa Gonzales McNeal 3 Serosa or Adventitia • Serosa –An example of a serous membrane –Covers all organs and walls of cavities not open

Muscles; Muscle Origin Insertion Action Innervation Artery Notes; anal sphincter, external: perineal body or central tendinous point of the perineum: encircles the anal canal; superficial fibers attach to the coccyx

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ORIGINAL ARTICLE . Surgical complications in 2,840 cases of hemorrhoidectomy by Milligan-Morgan, Ferguson and combined techniques . Guilherme de Almeida Santos I; Caroline Pinto Coutinho I; Matheus Matta Machado Mafra Duque Estrada Meyer I; Diego Vieira Sampaio I; Geraldo Magela Gomes da Cruz II

1. The ligament that extends from the anterior superior iliac spine to the pubic tubercle and forms the lower lateral boundary of the abdominal wall, is the:

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Pyloric stenosis refers to a pylorus that is narrow. This is due to congenital hypertrophy of the pyloric sphincter. The lumen of the pylorus is …