ANA 110 - Digestive System

ANA 110 - Digestive System - DIGESTIVE SYSTEM 1. List the...

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DIGESTIVE SYSTEM 1.List the components of the alimentary canal. How is it different than the digestive system? o Alimentary canal includes: Mouth Pharynx Esophagus Stomach Small intestine Large intestine Rectum Anus o The digestive system includes the alimentary canal and the accessory organs, while the alimentary canal does NOT include accessory organs 1.What are the accessory organs to the digestive system? o Salivary glands o Liver o Gallbladder o Pancreas 1.How do parasympathetic and sympathetic impulses influence digestive activity? o Parasympathetic impulses increase digestive activity (rest and digest) o Sympathetic impulses decrease digestive activity (fight or flight) 1.What are the main functions of the digestive system? o Ingestion o Mechanical digestion o Propulsion o Absorption o Defacation 1.What are the four main layers of the alimentary canal wall? Which layer is closest to the lumen of the alimentary canal? Which layer contains blood vessels, lymph vessels, and nerves? o The four main layers are mucosa (inner), submucosa, muscular, serosa (outer) o The layer closest to the lumen of the alimentary canal is the mucosa o The layer that contains blood vessels, lymph vessels, and nerves is the submucosa 1.What types of muscle are found in the muscle layer? o Circular and longitudinal muscle 1.What is peristalsis? o Wave-like movement moving food down the tract 1.Where does mechanical digestion occur? What is the purpose of this? o Mechanical digestion occurs in the mouth o The purpose of mechanical digestion is to prepare food for chemical digestion 1.Describe the tongue. What are the functions of the tongue? o the usually movable organ in the floor of the mouth; functioning in eating, in tasting, and in speaking o Contains papillae 1.What is the palate? How is the soft palate different from that of the hard palate? What structure is found at the tip of the soft palate? o The palate is the roof of the oral cavity o The soft palate is made of muscle and the hard palate is made of bone o The uvula is found at the tip of the soft palate 1.Describe the classifications of the teeth. How is the structure of the tooth adapted for its function?
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o 20 primary teeth; 32 secondary (adult) teeth o The incisors are chisel-shaped, and their sharp edges bite off larges pieces of food o The cuspids are cone-shaped, and they grasp and tear food o The bicuspids and molars have flattened surfaces and are specialized for grinding food 1.What structures surround the pulp cavity of the tooth? What is located in the pulp cavity? What happens to the tooth with age? o The dentin surrounds the pulp cavity; dentin is beneath the enamel and is composed of living cellular tissue, much like bone o The pulp cavity is a combination of blood vessels, nerves, and connective tissue called pulp o The enamel wears away with age 1.Label the salivary glands. Which glands secrete a clear, serous fluid? What enzyme is found in this fluid? Which glands secretes mucous?
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This note was uploaded on 04/18/2008 for the course ANA 108 taught by Professor Stein during the Spring '08 term at Kentucky.

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ANA 110 - Digestive System - DIGESTIVE SYSTEM 1. List the...

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