Rectum - Anatomy & Physiology - Flashcards
Revision as of 15:32, 31 August 2010 by Bara (talk | contribs) (Text replace - "Category:Alimentary System" to "Category:Alimentary System - Anatomy & Physiology")
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| Question | Answer | Article | |
| Describe the position of the rectum. | Dorsal to the reproductive organs, bladder and urethra
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| How is the rectogenital pouch formed? | Reflection of the mesorectum onto the peritoneal peritoneum of the pelvic cavity
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| How is defeaction stimulated? | Faeces in the rectum stimulate pressure sensitive cells which initiates the defeaction reflex
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| How is the conscious sensation for the need to empty the bowel produced? | A forceful contraction of the rectum against the external anal sphincter
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| What happens if the conscious need to empty the bowel is ignored? | The defeacation reflex is reduced until another mass movement occurs
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Link to Article | |
| What is the type of epithelium in the rectum? | Columnar
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| What happens to the epithelium at the recto - anal junction? | It changes from columnar to stratified squamous non-keratinised
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| What type of muscle forms external anal sphincter? | Skeletal
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