Anatomy of Digestive System: Stomach and Small Intestine

ANATOMY OF DIGESTIVE SYSTEM: STOMACH & SMALL INTESTINE

SCHOOL OF HEALTH SCIENCES HEALTH CAMPUS UNIVERSITI SAINS MALAYSIA

OBJECTIVES

 At the end of this lecture, the students should understand:

1) Introduction to Lower Gastrointestinal (GI) Tract 2) Gross Anatomy of Stomach 3) Relations Blood Supply, Lymphatic Drainage & Nerve Relations, Supply

Supply of Stomach 4) Gross Anatomy of Small Intestine 5) Bl d Supply, Lymphatic Drainage & Nerve Supply of Blood S l L h i D i N S l f Small Intestine

INTRODUCTION OF DIGESTIVE SYSTEM
 The organs involved in the g

breakdown of food  It has two anatomical subdivisions: a) Digestive tract b) Accessory organs

DIGESTIVE SYSTEM
 Digestive tract
 

 i.

ii.

Alimentary canal or gastrointestinal (GI) tract A tube extending from g mouth to anus (~ 9 meters long in cadaver) It includes; ; Upper GIT oral cavity, pharynx, esophagus Lower GIT stomach, small intestine, large intestine
(aliment = food)

DIGESTIVE SYSTEM
 Accessory organs y g

They include; i. teeth ii. tongue t iii. salivary glands iv. liver v. gall bladder vi. pancreas


* produce variety of secretions to contribute to breakdown of f d t ff b kd f foodstuffs

STOMACH
 Old names = grinding

chamber, fermentation vat, cooking pot  Dilated portion of alimentary canal between esophagus and small intestine (d d i t ti (duodenum) )  Site – it lies inferior to diaphragm in the epigastric, umbilical & left hypochondriac of the abdomen

Location of Stomach
Midclavicular lines Midsternal line

Subscostal line (10th costal cartilages) Umbilicus Transtubercular line (iliac tubercles)

Subscostal line

Anterior view showing location of abdominopelvic regions Anterior view showing location of abdominopelvic regions

Functions of Stomach
Stomach a) stores the food we ate b) breaks down the food into a liquidly mixture c) mix with enzymes which is chemical that breaks down food d) slowly empty that liquidly