1 / 14

Systems Review Notecards What is a system? What are the three components of a system?

Systems Review Notecards What is a system? What are the three components of a system?. Front of card: word. Back of card: definition or description. System. A system is …. Draw the web from Tuesday’s class. 3 Components of a System.

chynna
Download Presentation

Systems Review Notecards What is a system? What are the three components of a system?

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Systems Review Notecards What is a system? What are the three components of a system?

  2. Front of card: word Back of card: definition or description System A system is … Draw the web from Tuesday’s class 3 Components of a System NotecardsPeristalsis, mechanical digestion, chemical digestion, digestive system, absorption

  3. On the way to the stomach: the esophagus - After being chewed and swallowed, the food enters the esophagus. The esophagus is a long tube that runs from the mouth to the stomach. It uses rhythmic, wave-like muscle movements (called peristalsis) to force food from the throat into the stomach. This muscle movement gives us the ability to eat or drink even when we're upside-down. Can we eat upside down?http://www.youtube.com/watch?v=r97sFxdV6ow

  4. What do you think? Can they eat upside down? Make a hypothesis! How do you think food moves through the digestive tract? What do you think happens to the food as it moves back through the digestive tract?

  5. System Digestive

  6. http://www.whfoods.com/genpage.php?tname=faq&dbid=16#digestionhttp://www.whfoods.com/genpage.php?tname=faq&dbid=16#digestion Animation of Digestion

  7. What is the FUNCTION(PURPOSE)OF the Digestive SYSTEM?

  8. Digestion Definition • Digestion is the breaking down of food into smaller and simpler substances • Mechanical digestion and Chemicaldigestion do this in different ways

  9. Digestion Definition • MECHANICAL (physical) digestion • breaking down of food into smaller pieces • involves: chewing, grinding, churning • CHEMICAL digestion • Breaking down of food into simpler substances (building blocks) • involves: enzymes • ABSORPTION • Broken down food gets from digestive tract into the body (blood)

  10. Smaller pieces allow for more areas of contact for enzymes and digestive juices to act on speeding up chemical digestion CHEMICAL MECHANICAL

  11. Where do you think most of the absorption takes place?

  12. Absorption passage of molecules into body's interior &passage throughout the body

  13. TIME FOR PERISTALSIS EXPERIMENT! But what is peristalsis and how do we even say that word??? Peristalsis is the involuntary waves of muscle contraction that push the food through the esophagus towards the stomach. Hmm… I wonder what we are doing in our experiment?

  14. Observations • Look and record what you see and do. Describe in words and diagrams. • Top of the tube • Tube • Food particles • Fingers • Bottom of the tube • Word choices: mouth, esophagus, food particles, peristalsis, stomach, enzyme, teeth, saliva, digestion, mechanical digestion, chemical digestion, epiglottis, chew, churn, cut ALWAYS OBSERVE SAFETY RULES! CLEAN UP WHEN FINISHED!

More Related