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Digestive System
Science
| Question | Answer |
|---|---|
| Why is the digestive system important? | It allows us to take in and process food so that we could provide our body with the nutrients and energy needed for metabolism. |
| Mechanical digestion. | Food is made smaller using teeth and tongue, physical breakdown. |
| Chemical digestion. | Food is broken down using enzymes. |
| Where does chemical digestion begin? | The mouth. |
| Where does the digestion of starches begin? | The mouth. |
| What enzyme breaks down starches in the mouth that is present in saliva? | Amylase. |
| Where does ingestion begin? | The mouth. |
| Another name for the mouth. | Oral cavity. |
| What do teeth do? | Mechanically break down food into smaller pieces. |
| What does the tongue do? | Mixes up chewed food and pushes it down the throat. |
| What do the salivary glands do? | Secrete saliva through a duct and into the mouth. |
| Esophagus. | Tube that connects the mouth to the stomach. |
| Wavelike contractions that move food down the esophagus. | Peristalsis. |
| Seals off the trachea while eating so food isn't accidentally inhaled. | Epiglottis. |
| Another name for windpipe. | Trachea. |
| Another word for throat. | Pharynx. |
| Function of the stomach. | A muscular organ that helps to liquefy and digest food while also secreting/releasing digestive enzymes. |
| Present in the gastric juices in the stomach, helps breakdown food, kills bacteria, and helps maintain a proper pH. | Hydrochloric acid. |
| Gastirc glands/Juices. | Enzymes. |
| Secretes mucus in the stomach. | Pyloric acids. |
| Where does final digestion occur? | Small intestine. |
| Where does the absorption of nutrients occur? | Small intestine. |
| Enzymes in the small intestine that help it break down proteins, lipids, and sugars. | Protease, Lipase, and Maltase/Sucrase. |
| True or False: Most chemical digestion occurs in the stomach. | False, the small intestine. |
| A lining in the small intestine that increases surface area and are covered in capillaries/blood vessels for absorbing digested materials. | Villi. |
| Where diffusion of nutrients occurs in the small intestine. | Capillaries. |
| Another name for the large intestine. | Colon. |
| Function of the large intestine. | Reabsorbs water and forms undigested material into semi-solid feces. |
| Where is feces stored? | In the rectum. |
| Where is the feces released and what is this process called? | Anus, egestion/defecation. |
| Alimentary canal. | The tube through which food passes, extends from the mouth to the anus. |
| Another name for alimentary canal. | GI Tract/Digestive tube. |
| Organs which the alimentary canal passes through. | Mouth, esophagus, stomach, small intestine, large intestine, rectum, anus. |
| Three accessory organs. | Liver, gall bladder, pancreas. |
| Function of the liver. | Produces bile to emulsify (break down into smaller droplets) fats. |
| Function of the gall bladder. | Stores bile. |
| Function of the pancreas. | Makes and stores the digestive enzyme, pancreatic juice. |
| End product of the breakdown of carbohydrates, fats, and proteins. | Simple sugars, fatty acids and glycerol, amino acids. |
| Where does the breakdown of protein begin? | Stomach. |
| Elimination of watery feces. | Diarrhea. |
| Disorder that results in dehydration. | Diarrhea. |
| Frequent evacuation of wastes. | Diarrhea. |
| Quick peristaltic activity. | Diarrhea. |
| Disorder where feces remains in the colon for too long. | Constipation. |
| Caused by little fiber and water in diet. | Constipation. |
| Sluggish peristaltic activity. | Constipation. |
| Small, hardened cholesterol deposits that form in the gall bladder, block the flow of bile and cause severe pain. | Gallstone. |
| Inflammation of the appendix. | Appendicitis. |
| An open, painful sore that erodes the stomach lining. | Ulcers. |