slide1
Download
Skip this Video
Download Presentation
The Digestive System

Loading in 2 Seconds...

play fullscreen
1 / 13

The Digestive System - PowerPoint PPT Presentation


  • 92 Views
  • Uploaded on

The Digestive System. A Brief Introduction. YouTube Clip: I can\'t believe it remix ( The Digestion Song) Travis Finlay http://www.youtube.com/watch?v=SyVcyT-fOao. Learning Goals. I understand the function and stages of the digestive system

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 ' The Digestive System' - lynton


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
a brief introduction
A Brief Introduction...

YouTube Clip: I can\'t believe it remix ( The Digestion Song) Travis Finlay

http://www.youtube.com/watch?v=SyVcyT-fOao

learning goals
Learning Goals
  • I understand the function and stages of the digestive system
  • I know the structure and function of the organs involved in the digestive system.
  • I know the diseases associated with the digestive system.
what does the digestive system do
What does the Digestive System do?
  • Takes in food
  • Breaks food down into smaller units
  • Absorbs nutrients
  • Excretes waste

Digestion: The process of breaking down food to provide nutrients and energy for growth, repair and reproduction.

the four stages of digestion
The Four Stages of Digestion
  • Ingestion: Intake of nutrients
  • Digestion: Breakdown of nutrients into smaller units by:

a. Physical – Mechanical breakdown of food

b. Chemical – Enzymes and chemicals that breakdown food

3. Absorption – Taking nutrients into cells

4. Egestion – Excretion of waste

the digestive tract
The Digestive Tract
  • One long tube that extends from the mouth all the way down to the anus
  • Goblet cells secrete mucus
  • Madeof epithelial tissue, layers of muscles and nerves
  • Food moves through by a process called peristalsis.

Wave like motion from the alternate contraction/relaxation of smooth muscle in the digestive tract.

definitions
Definitions
  • Mucus – Secreted by goblet cells in the epithelial tissue. Has two functions:

1. Protects the digestive tract from enzymes

2. Allows the digested material to pass through the tract

  • Accessory Organ – Aids in the process of digestion but food does not actually pass through.
summary
Summary
  • The digestive system takes in food, breaks it down, absorbs nutrients and excretes waste.
  • The digestive system is made up of the digestive tract and accessory organs.
  • The digestive tract is one long tube with opening at either ends and includes the mouth, esophagus, stomach , large intestine, small intestine, and anus.
  • The digestive tract includes epithelial tissue, smooth muscle tissue, nerves and connective tissues. The smooth muscles can contract and relax involuntarily.
  • The accessory organs aid in the process of digestion and include the liver, pancreas and gall bladder.
homework
Homework
  • In class: Questions from textbook page 82 # 2, 3 and 4.
  • Gizmo on the Digestive System.
  • - Complete the 5 page handout (Parts A and D) for homework and answer the 5 quiz questions online.
  •  Due Friday in class
  • QUIZ ON MONDAY
ad