digestive system n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Digestive System PowerPoint Presentation
Download Presentation
Digestive System

Loading in 2 Seconds...

play fullscreen
1 / 48

Digestive System - PowerPoint PPT Presentation


  • 104 Views
  • Uploaded on

Digestive System. Digestion. Introduction Physical Digestion Chemical Digestion Hepatic Portal System. Digestive System: Overview. Figure 24.1. Digestive Process. Figure 24.2. Figure 15.3. Essential Activities of Digestion. Figure 24.3a, b. Digestive Process. Figure 24.2.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Digestive System' - waseem


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
digestion
Digestion
  • Introduction
  • Physical Digestion
  • Chemical Digestion
  • Hepatic Portal System
mouth tongue
Mouth & Tongue

Figure 24.7a

salivary glands ii
Salivary Glands II

Figure 24.9a

teeth
Teeth

Figure 24.10.2

digestive processes in the mouth
Digestive Processes in the Mouth
  • Food is ingested
  • Mechanical digestion begins mastication
  • Propulsion is initiated by swallowing
  • Salivary amylase
esophagus
Esophagus

Figure 24.13d, e

stomach
Stomach

Figure 24.14a

regulation of gastric secretion
Regulation of Gastric Secretion
  • Stimulatory and inhibitory events occur in three phases
    • Cephalic (reflex) phase
    • Gastric phase
    • Intestinal phase
cephalic phase
Cephalic Phase
  • Excitatory events include:
  • Inhibitory events include:
  • Inputs come from olfactory receptors and taste buds  hypothalamus vagal nuclei  parasympathetic ganglion
gastric phase
Gastric Phase
  • Excitatory events include:
  • Inhibitory events include:
  • Chemicals released
    • Gastrin
    • Ach
    • Histamine
intestinal phase
Intestinal Phase
  • Excitatory phase
  • Inhibitory phase
large intestine
Large Intestine

Figure 24.29a

chemical digestion protein
Chemical Digestion Protein
  • Stomach
    • Pepsinogen Pepsin
  • Small Intestine
    • Trypsin, Chymotrypsin, Carboxypeptidase
    • Brush Border Enzymes – Aminopeptidases
    • Carboxypeptidases
chemical digestion nucleic acids
Chemical Digestion: Nucleic Acids
  • Hydrolyzed to their nucleotide monomers by pancreatic nucleases present in pancreatic juice
  • Absorption: active transport via membrane carriers
    • Absorbed in villi and transported to liver via hepatic portal vein
  • Enzymes used: pancreatic ribonucleases and deoxyribonuclease in the small intestines
summary
Summary
  • Introduction
  • Physical Digestion
  • Chemical Digestion
  • Hepatic Portal System