Anatomy > QUESTIONS & ANSWERS > Portage Learning A&P 1 Module 3. Q&A. 100% Approved pass rate. (All)

Portage Learning A&P 1 Module 3. Q&A. 100% Approved pass rate.

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What are the two main groups of digestive system? - Ans-1. alimentary canal 2. accessory digestive organs What is the alimentary canal? - Ans-Continuous muscular digestive tube that runs from the mouth to the anus What are parts of the alimentary canal? - Ans-mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus What are the accessory organs of the digestive system? - Ans-teeth, tongue, gall bladder, salivary glands, liver, pancreas The mouth is made of what structures? - Ans-Lips (opening) tongue (floor) cheeks (walls) hard and soft palate (roof) Uvula (posterior border) What is the lingual frenulum? - Ans-Fold of mucous membrane that secures the tongue to the floor of the mouth What are the tongues attachment points? - Ans-hyoid bone mandible lingual frenulum What is mastication? - Ans-mechanical process of breaking down food with teeth what is amalyse? - Ans-Enzyme secreted by salivary glands that breaks down starches How many teeth are in the human mouth? - Ans-32 What is the purpose of each tooth? - Ans-incisor = biting canine = tearing premolar = grinding flat molar = crushing Three main parts of the teeth - Ans-Root - the largest portion of the teeth Neck- portion contained in upper portion of gingiva Crown- visible portion of tooth above gum line What is Dentin? - Ans-bone like substance of the tooth What is Enamel? - Ans-hard connective tissue which protects rest of the tooth What is the purpose of the tongue? - Ans-grips food and constantly repositions between teeth as well as pushes bolus to pharynx What types of papillae contain taste buds? - Ans-circumvallate, fungiform Where are taste buds found? - Ans-tongue, surface of mouth, wall of pharynx What is purpose of pharynx - Ans-throat connects the mouth to the esophagus purpose of two skeletal muscles in pharynx? - Ans-circumferential (outer layer) longitudinal (inner layer) contract alternatively causing peristalsis, squeezing food to esophagus What is the purpose of esophagus? - Ans-transports food from the mouth to the stomach What is name of sphincter that separates esophagus and stomach? - Ans-cardiac Four layers of the alimentary canal - Ans-mucosa- secretes mucus to move bolus submucosa- contains blood, lymph nodes, and nerve endings muscularus externa- muscles that contract and move bolus through GI tract serosa- makes serous fluid to keep GI tract lubricated Layers of muscularus externa - Ans-Inner- circumferential Outer- longitudinal Oblique- only in stomach, helps intensify peristalsis for stomach digestion What is the purpose of the stomach? - Ans-Temporary storage are for food, digests and breaks down food w/ combination of muscles and digestive juices How does stomach attach? - Ans-Lesser omentum- lesser curvature of stomach to liver greater omentum- attaches to greater curvature of stomach and posterior wall of abdomen, hangs like apron

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