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Digestive and Excretory Systems

Digestive and Excretory Systems. Chapter Four Lesson Four Pages 122-127. How Your Body Digests Food. _________________________________________.

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Digestive and Excretory Systems

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  1. Digestive and Excretory Systems Chapter Four Lesson Four Pages 122-127

  2. How Your Body Digests Food _________________________________________. digestion The process by which the body breaks down food into smaller pieces that can be absorbed by the blood and sent to each cell in your body

  3. How Your Body Digests Food Food is processed in your body by the digestive system. digestive system: _________________________________________ _________________________________________________________

  4. The Meaning of Digest The word digest comes from a Latin word meaning “to separate.”

  5. Where Does Digestion Begin? When you crush food with your teeth, saliva mixes with the food. Amylase, an enzyme in saliva, begins breaking down carbohydrates in the food. Saliva: _________________________________________________ Enzyme: ________________________________________________

  6. Where Does Digestion Begin?

  7. Your Digestive Organs After you swallow, food moves into your esophagus, then into your stomach, then into the _____________________________. small intestines A coiled tube from 20 to 23 feet long, in which about 90 percent of digestion takes place

  8. Your Digestive Organs The liver and pancreas are two important organs in the digestive system. Liver: ______________________________________________ pancreas A gland that helps the small intestine by producing pancreatic juice, a blend of enzymes that breaks down proteins, carbohydrates, and fats

  9. Your Digestive Organs _________________________________________ _________________________________________ colon A tube five to six feet in length that plays a part in both digestion and excretion Any _____, _______, ________, and ______ left in the food mixture are absorbed by the colon.

  10. Removing Wastes Excretion is a process of the excretory system. excretion The process the body uses to get rid of waste excretory system The group of organs that work together to remove wastes _______________________________________ _______________________________________

  11. Removing Wastes The kidneys help in the production of red blood cells and the regulation of blood pressure. Kidneys: _______________________________________ _______________________________________ ________________________________________ ________________________________________

  12. Removing Wastes Your body’s solid wastes are called feces, which are stored in the colon until that organ becomes full. Strong muscles in the wall of the colon begin to contract, which is a signal that the colon must be emptied.

  13. Caring for Your Digestive and Excretory Systems Tips for Caring for Your Digestive and Excretory Systems Eat a balanceddiet with low-fat,high-fiber foods _______________ _______________ Brush your teeth at leasttwice a day, floss, and getdental checkups twice a year. __________________ __________________

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