oral cavity

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155 sahifa oral cavity — PPT

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oral cavity oral cavity dr. smsaeed regions of the oral cavity vestibule oral cavity proper superior inferior anterior posterior hard palate soft palate tongue floor of the mouth teeth & gingiva ring of tonsils lingual tonsil pharyngeal tonsil palatine tonsil oral cavity structure of oral cavity mucosa submucosa muscle-bone structure types functions epithelium lam pro st squamous orthokeratinized parakeratinized nonkeratinized ct layers cells intercellular sub papillary reticular masticat specialized lining protection secretion sensation permeability regulation lct glands or fatty present? bvs+nerves tooth structure types of oral mucosa types of oral mucosa stratified squamous epithelium orthokeratinised stratified squamous epithelium parakeratinised stratified squamous epithelium non-keratinised oral cavity the lip the cheek core external surface internal surface vermilion core external surface internal surface skin glands hair follicle epidermis dermis sweat sebaceous mucosa submucosa epithelium lamina propria skin glands hair follicle mucosa submucosa epithelium lamina propria connective tissue glands capillaries cheek and lip the …

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appendix colon ac tc dc sc how is the alimentary visceral tube modified? & what are its accessory organs? the tube has some straight sections, but is mostly bent, wiggly, or coiled the tube enlarges in places the tube is subdivided into compartments, where the content is held by valves for only so long mostly smooth muscle churns and moves the content along the tube has a characteristic wall, with local modifications, particularly to the mucosal lining the accessory organs are glands - salivary, liver & pancreas actions are coordinated by nervous & endocrine controls tube man esophagus stomach small intestine absorption of simple food materials into the blood & lymph large intestine pancreas liver rectum gallbladder mouth recovers water and electrolytes, so consolidating feces colon roles of the parts digests food into simpler forms for starts digestion and breaking food up further makes enzymes to digest food propels food …

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h esophagus epithelium tunica muscularis externa tunica adventitia } tunica mucosa muscularis mucosae* epithelium is protective stratified squamous tunica submucosa lamina propria connective tissue attached to spine, etc coordinated wave of contraction propels food to stomach nerve plexuses coordinate muscle actions epithelium lamina propria tunica muscularis externa internal circular external longitudinal } tunica mucosa esophagus ii muscularis mucosae tunica submucosa skeletal in upper 1/3rd not many glands - lubrication mostly comes from salivary mucus tunica adventitia unmyelinated autonomic nerve externalmuscle submucosa auerbach’s myenteric plexus meissner’s submucosal plexus rare neuron bodies of plexus clumped neurons of a’s plexus gut motor innervation in wall with h & e staining, the only neural elements seen are the neuron bodies & characteristic nuclei. the plexuses of fibers are unseen. neurons are multipolar, with dendrites! innervation in gut wall: for sensory feedback on content, movement, distension, irritants, reflexes autonomic motor control of muscle actions - …

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parasympathetic y y v i r a e c s esophagus mention the main layers of the esophagus. esophagus in mouth, food formed into a bolus, then swallowed esophagus = muscular tube w/ primary function of getting bolus to stomach no digestion occurs here! swallowing is complex process coordinated by swallowing center in medulla oblongata bolus enters esophagus  stimulates stretch receptors  (afferent signals) medulla  (efferent impulses) initiate peristalsis  propels bolus toward stomach swallowing misdirection of bolus prevented by tongue (blocks oral cavity), soft palate (blocks nasal cavity), & epiglottis (blocks trachea) incompetent valve - reflux esophagus stomach small intestine bad absorption obstruction inflammation large intestine pancreas liver rectum gallbladder mouth v appendix ac tc dc sc gi problems difficult swallowing gastritis excess acid ulcer pernicious anemia inflammation stone inflammation inflammation perforation poor motility constipation necrosis from blocked single-artery supply inflammation cirrhosis jaudice etc cancer, as for …

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en more intestinal than gastric, and carries a significant risk for adenocarcinoma stomach histologic 4 layers mucosa submucosa muscularis externa serosa rugae gastric pits components epithelium lam propria lct glands types regions lct meissner's plexus inner oblique middle circular outer longitudinal muscularis mucosae auerbachs plexus types gastric pits where lesser omentum attaches greater curvature lesser curvature stomach: divisions waberesford fundus corpus cardia lab: stomach is an elongated, wrinkled bag; sometimes surprisingly small; omenta may have been cut/pulled off; find attachments to esophagus & duodenum pylorus rugae/ folds of mucosa & submucosa inside, the lining is rough from stomach: divisions fundus histology shows corpus & fundus to be the same = “fundic stomach” waberesford corpus pylorus cardia stomach: wall gastric glands rugae/ folds of mucosa & submucosa mucosa muscularis mucosae submucosa muscularis externa serosa surface simple columanr epithelium with gastric pits muscularis mucosae muscularis externa stomach: muscle layering unlike the esophagus, …

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oral cavity oral cavity dr. smsaeed regions of the oral cavity vestibule oral cavity proper superior inferior anterior posterior hard palate soft palate tongue floor of the mouth teeth & gingiva ring of tonsils lingual tonsil pharyngeal tonsil palatine tonsil oral cavity structure of oral cavity mucosa submucosa muscle-bone structure types functions epithelium lam pro st squamous orthokeratinized parakeratinized nonkeratinized ct layers cells intercellular sub papillary reticular masticat specialized lining protection secretion sensation permeability regulation lct glands or fatty present? bvs+nerves tooth structure types of oral mucosa types of oral mucosa stratified squamous epithelium orthokeratinised stratified squamous epithelium parakeratinised stratified squamous epithelium non-kera...

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