Download presentation
1
The Digestive System
2
Similarities and Differences in Organ Systems Compared to Humans?
Perch Dissection Similarities and Differences in Organ Systems Compared to Humans?
3
Similarities Differences Gallbladder Liver Pancreas Spleen
Pyloric caeca Liver Swim Bladder Pancreas Spleen
4
Pyloric Caeca
5
Digestive System Animation
6
Digestive System Parts
Mouth Esophagus Stomach Liver Gallbladder Pancreas Small Intestine Large Intestine Rectum and Anus
7
Mouth Physical Digestion – chewing 32 teeth Tongue
12 molars, 8 premolars, 4 canines, 8 incisors Tongue Taste buds distinguish between type of food Moves food around forming bolus Chemical Digestion – salivary amylase
8
Teeth and Taste Buds
9
Esophagus
10
Esophagus Receives bolus from the pharynx
Moves bolus to stomach by peristalsis
11
Stomach
12
Stomach Receives bolus from the esophagus through the lower esophageal sphincter Mixes the food with gastric juices containing HCl Mucus helps protect the stomach lining Pepsin - a digestive enzyme, helps break down large protein molecules Creates a mixture called Chyme which is moved through the pyloric sphincter to the small intestines
13
Liver
14
Liver Releases bile which emulsifies fats and help absorb fatty acids, cholesterol and some vitamins Stores carbohydrates and vitamins and detoxifies many harmful substances
15
GallBladder
16
Gallbladder Stores bile that is produced by the liver
Gallstones – crystallized substances from bile in the gallbladder Can result in surgery to remove gallbladder
17
Pancreas
18
Pancreas Secretes digestive enzymes Neutralizes chyme
Secrete Hormones: Insulin – lowers blood sugar levels Glucagon – raises blood sugar levels
19
Small Intestine
20
Small Intestine 9 to 10 feet long
Composed of 3 parts : duodenum, jejunum and the illeum Most important absorbing organ Digestion is completed in the small intestine
21
Large Intestine
22
Large Intestine Also called the colon Comprised of 4 sections
Ascending, Transverse, Descending and Sigmoid Little or no digestive function Chyme becomes feces which is stored until elimination
23
Rectum and Anus
24
Rectum and Anus Rectum – temporary storage facility for feces
Internal and External sphincters allow feces to be passed by muscles pulling the anus over the feces
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.