Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Warm Up! Starting today you will have to formulate the answer to the questions from your exam last Friday. CBA (6 WEEK EXAM) NEXT WEDNESDAY! You will HAVE to write all over your exam in order to receive credit ;) EXTRA CREDIT OPPORTUNITY…due wed. Quick review of the last two days… one person please explain HYDROLYSIS one person please explain DEHYDRATION SYNTHESIS How can ENZYMES play a part in this? Digestive Man… • Take 3 minutes to label the man in the picture you have. • PREDICT where the following organs belong… Liver Large Intestines Pancreas Anus Small Intestines Esophagus Stomach Salivary Glands Rectum Gall Bladder Mouth Digestive System Remember levels of organization? Where are we now? Atom Molecule Macromolecule Organelle Cell Tissue Organ Organ System Organism! WHAT IS DIGESTION? process by which food & drinks are broken down into their smallest parts so that the body can use them Notes: THE DIGESTIVE SYSTEM Digestive Tract (Alimentary Canal) 1. 2. 3. 4. 5. 6. 7. Mouth Esophagus Stomach Small Intestine Large Intestine Rectum Anus Other Digestive Organs A. B. C. D. Salivary Glands Liver Gall Bladder Pancreas Structures Each bullet represents a box on your handout. Write the name of the structure inside the box and draw a picture to represent its function. • Mouth • *Small Intestine • Esophogus • Large Intestine • Stomach • Rectum • Helping Organs: -pancreas -gallbladder • Anus FUNCTIONS OF DIGESTIVE ORGANS Remember… Starches are complex carbohydrates! Mouth - digestion begins here. * Chemical Digestion Saliva has the ENZYME AMYLASE which breaks down carbohydrates: starches into simple sugars(glucose). * Physical or Mechanical Digestion - teeth tear food into smaller pieces. Functions *Tongue- Works to roll the food into a ball called a BOLUS. *Esophagus-. Transportation tube leading from mouth to stomach *Moves food with muscular contractions called peristalsis *Ring of muscles at bottom relax to allow food into stomach and contract to keep food from coming back up No digestion occurs in the esophagus Functions • Stomach- Gastric juices (hydrochloric acid and enzymes) work with muscle contractions to reduce the size of the food particles. * Stomach acid activates the pepsin that digests protein into smaller proteins. *The food becomes a cream-like liquid called CHYME. Think…How does hydrochloric acid affect enzymes in the stomach? *Hydrochloric Acid (HCl) - breaks down proteins and kills microorganisms *Pepsin - enzyme which helps break down proteins and lipids. *Mucus protects lining of stomach from acids. *Food with all of these chemicals is now called chyme *Liver –Produces bile to help digest lipids – Bile breaks down lipids into FATTY ACIDS and GLYCEROL. –Filters toxins from the blood * Gall Bladder –stores the bile until it is needed. Digestion Small Intestine – Final digestion occurs here and nutrients are absorbed by the small intestine villi. Function • Large Intestine- Whatever the body cannot put to use is sent to the large intestine. • Water is now released into the blood stream. • This spends about 12 hours becoming FECES and later leaves the body through the anal opening. However…….. • Not EVERYTHING we eat is digested • Undigested fats, proteins and carbohydrates leave the body through the anal opening. Make sure you have the organs properly labeled! Large Intestine Small Intestine GREEN CHART • Complete the green chart with the function of each organ we have learned about today and it’s role in digestion!