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splanchnology Chapter 4 Introduction 1. The concept and function
Splanchnology is a subject that studies the shape, structure and position of the organs of viscera. Viscera includes alimentary system, respiratory system, urinary system and genital system. funtion: The main functions of the viscera are to fulfil the metabolism and maintain the life of species.
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The main functions of alimentary system are to ingest the food, to secrete enzymes, to absorb the products of the digestive action, and to eliminate the unused residues. The respiratory system is to carry out the gas exchanges --- supply of oxygen for living cells and remove of carbon dioxide resulting from cell metabolism. The primary function of urinary system is to keep the body in homeostasis by removing and restoring selected amount of water and solutes, excreting the various wastes. The functions of genital system are to produce germ cells (ovum and sperm) and to secrete some hormones.
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2. General structure of viscera
The hilum of right lung porta hepatis The visceral surface of the liver renal hilum The anterior view of the left kidney 2. General structure of viscera mucosa (submucosa) tubular organs muscular coats serosa Parenchymatous organs hilum/porta
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3. The reference lines of thorax
the anterior median line the sternal line the midclavicular line the parasternal line the anterior axillary line the midaxillary line the posterior axillary line the scapular line the posterior median line
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The 4 abdominal regions left upper abdomen right upper abdomen
left lower abdomen right upper abdomen right lower abdomen The 4 abdominal regions
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4 The abdominal regions (9 region )
left hypochondriac umbilical left lumbar left inguinal (left iliac) epigastric right lumbar hypogastric/pubic right inguinal (right iliac) right hypochondriac 4 The abdominal regions (9 region )
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Chapter 5 Alimentary/digestive system
mouth/oral cavity pharynx esophagus alimentary canal duodenum stomach jejunum small intestine large intestine ileum salivary glands liver alimentary gland Pancreas Small gland The upper/lower alimentary canal
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1. The oral cavity oral vestibule oral cavity proper 1) Lips 2) Cheek
Sublingual gland Submandibular gland Parotid gland Parotid duct The opening of the parotid duct Palate Palatopharyngeal arch Palatoglossal arch Palatine tonsil Uvula tongue 1. The oral cavity oral vestibule oral cavity proper 1) Lips 2) Cheek 3) Palate: Hard palate Soft palate Palatine glands Isthmus of fauces Tonsillar fossa 4) Palatine tonsile
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5) The teeth/dentes deciduous teeth (20): incisors 2, canine 1,
molars 2 permanent teeth (32): incisors 2 canine 1 premolars 2 molars 2~3
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The basic structure of teeth
enamel dentine cement periodontal membrane alveolar bone gums dental pulp The basic structure of teeth The shape : crown, neck and root Dental cavity : cavity of crown, root canal The tissue : dentine, enamel, cement and dental pulp The periodontal structure: periodontal membrane, alveolar bone and gums/gingiva.
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6) The tongue frenulum of tongue The shapes:
apex, body, root of tongue The mucous membrane: filifirm papillae fungiform papillae vallate papillae taste bud foliate papillae The muscle: intrinsic muscle extrinsic muscle: styloglossus hyoglossus genioglossus
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2. The pharynx The anterior wall of pharynx 1) Position nasopharynx
the opening of auditory tube The sagittal section of the skull and neck The anterior wall of pharynx the opening of auditory tube The sagittal section of the skull and neck 2. The pharynx 1) Position nasopharynx 2) Parts oropharynx laryngopharynx 3) Communication nasopharynx nasal cavity tympanic cavities of the middle ear oropharynx oral cavity laryngopharynx laryngeal cavity esophagus.
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2) The position of the three constriction 3. Esophagus
the first constriction the distance from incisor position the beginning (commencement) or lower border of 6th C or the level of cricoid cartilage the esophageal hiatus or the lever of the 10th T the second the third 15cm 25cm 40cm the intersection with left bronchus or the level of the sternal angle or the lower border of the 4th T 3. Esophagus 1) The position 2) The position of the three constriction the first constriction the distance from incisor position the beginning (commencement) or lower border of 6th C or the level of cricoid cartilage the esophageal hiatus or the lever of the 10th T the second the third 15cm 25cm 40cm the intersection with left bronchus or the level of the sternal angle or the lower border of the 4th T The esophagus and its relationships First constriction Cervical part Trachea Aortic arch Principal bronchus Second constriction Thoracic aorta Thoracic part Third constriction Abdominal part Inferior vena cava
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4. Stomach/gaster 1)the shape 2)the parts two orifices: two curvature:
lesser curvature pylorus cardia greater curvature angular incisure lesser curvature pylorus cardia greater curvature angular incisure 4. Stomach/gaster 1)the shape two orifices: two curvature: two surface: 2)the parts cardiac part fundus of stomach body of stomach pyloric part pyloric antrum pyloric canal
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3)The position In middle full left hypochondriac region
epigastric region, and umbilical region; cardia on the left of the eleventh thoracic vertebra, pylorus on the right of the first lumbar vertebra. hypochondriac region hypochondriac region epigastric region umbilical region The position of stomach
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4)The relation of stomach
The anterior surface: The L part is contact with diaphragm The R part is relation with the left and quadrate lobes of live and the anterior abdominal wall. The posterior surface: It is relation with the spleen, the diaphragm, the left suprarenal gland, the upper part of the left kidney, the splenic blood vessels, the pancreas, the left colic flexure, the transverse colon and its mesocolon. These structures form the stomach bed.
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5)the musculature and inner
surface of stomach The musculature: The wall of stomach has three layer muscle. The outer is longitudinal, the middle circular, the inner oblique and incomplete. At the pylorus, the middle circular muscle thicken and form a muscular ring ---the pyloric sphincter. It can control the pylorus open and close. The inner surface: When the stomach is empty, the mucosa form many ridges and rugae. But the mucosa of pyloric part is smooth. Gastric neoplasm and ulcers, the mucous pattern will be changed and become radiological. lesser curvature pylorus cardia greater curvature angular incisure
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5. the small intestine superior part descending part duodenum
The mesentery 5. the small intestine superior part descending part duodenum horizontal part ascending part jejunum ileum
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6. the large intestine 1) parts caecum vermiform appendix colon rectum
about 1.5 m long 6. the large intestine 1) parts caecum vermiform appendix colon rectum anal canal
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McBurney’s point 2) The characteristics of the cecum and colon colic bands haustras of colon epiploic appendices 3) The cecum and the vermiform appendix The position of appendix retrocecal and retrocolic in 65.28% pelvic in 31.01% subcecal in 2.26% pre-ileal in 0.4% post-ileal in 1.0% higher and left position
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4) colon ascending colon transverse colon parts descending colon
sigmoid mescolon transverse mescolon right colic flexure left colic flexure 4) colon ascending colon transverse colon parts descending colon sigmoid colon
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5) rectum sacral flexure two flexures perineal flexure
Ampulla of rectum Transverse folds of rectum
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6) the anal canal anal column anal valves anal sinuses inner surface
Columnar epithelium Stratified columnar epithelium Stratified squamous epithelium 6) the anal canal anal column anal valves anal sinuses inner surface dentate line anal pecten white line sphincter ani internus sphincter sphincter ani externus
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7. The alimentary gland 1) salivary gland Minor gland parotid gland
Opposite the crown of second upper molar Opening of parotid duct sternocleidomatoid masseter muscle 7. The alimentary gland 1) salivary gland Minor gland parotid gland Major gland submandibular gland sublingual gland
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8. liver/hepar The liver is the largest gland in our body.
Nutrients, vitamins, mineral, and other products of digestion(include the poison) 8. liver/hepar The liver is the largest gland in our body. Food processing factory 1. Functions 1) produce bile 2) synthesis glycogen albumin 3) detoxification
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right hypochondriac region epigastric regions
Caudate lobe gallbladder quadrat lobe Left lobe Right lobe hepatic portal v. gallbladder hepatic duct proper hepatic a. inferior vena cava bare area porta hepatis systic duct common bile duct R. triangular lig. gallbladder falciform lig. diaphragm L. triangular lig. coronary lig. L. lobe R. lobe lig. teres hepatis 1) The position right hypochondriac region epigastric regions left hypochondriac region beneath the diaphragm behind the ribs 2) The shapes superior surface/ diaphragmatic surface: inferior surface/ visceral surface:
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On the superior surface: right lobe left lobe
L. lobe R. lobe quadrate lobe caudate lobe R. triangular lig. gallbladder falciform lig. diaphragm L. triangular lig. coronary lig. L. lobe R. lobe lig. teres hepatis 3) The lobe of liver On the superior surface: right lobe left lobe On the inferior surface: right lobe, left lobe quadrate lobe caudate lobe.
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9. The gallbladder and the biliary ducts fundus of gallbladder
body of gallblader neck of gallbladder cystic duct right and left hepatic duct common hepatic duct common bile duct
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10. The drainage of the bile
hepatocyte bile canaliculi intralobular bile ductules R. hepatic duct L. hepatic duct common hepatic duct common bile duct Cystic duct gallbradder hepatopancreatic ampulla Major duodenal papilla
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11. The Pancreas position head neck parts body tail function
exocrine part endocrine part
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