Lecture 7 - Fig. 46-4, pg. 993 Basic LayersFig. 46-5, pg....

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Why do we eat? What do we eat? Human Digestive System Functions General Functions Organs Fibers Soluble Insoluble Steroids CW-Lipoprotein Sizes Lipoproteins -LDL—low-density -HDL—high-density -packaged with Fats to move them around Proteins—amino acids Protein quality High—All amino acids (19) that body needs vs. Low—Do not cover all amino acids Animal Plant “complete” Essential Nutrients—only way to get in to body is through digestive system Macromolecules -3 Fatty Acids -9 Amino Acids (no carbohydrates)
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Vitamins -organic compounds necessary in small amounts that we cannot make ourselves Fat Soluble: A, D, E, K Water Soluble: C, B complex (11) Minerals >100 mg/day Ex. Na+, Cl-, K+, Ca++, P <100 mg/day Ex. Fe, Cu, I, F Fe—hemoglobin Cu—cofactor in enzymes I—Thyroid F—Heart Water Human Digestive System Functions Ingestion Digestion Absorption Elimination General Structure -one-way digestive system -complete digestive system
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Unformatted text preview: Fig. 46-4, pg. 993 Basic LayersFig. 46-5, pg. 993 Visceral Peritoneumconnective tissue that connects the tube to body wall Submucosaconnective tissue with blood vessels and nerves Muscle LayerOuter Longitudinal Layer--Inner Circular Fibers Mucosamucus Peristalsiscombined action of the smooth muscle layers Human Digestive Organs Oral Cavity-Food to Bolus-salvation starts the process of digesting starch Ingestion Esophagus/Swallowing (deglutition)-reflex, top of esophagus is skeletal muscleesophagus in the back-upper esophageal sphincterring of muscle that dilates and contracts-epiglottis Beginning of esophagus is skeletal muscle Middle of esophagus is skeletal and smooth muscles End of esophagus is smooth muscle End of esophaguscardiac sphincter-lower esophageal sphincter Stomach Holds 1+ liters-3 to 4 Hours...
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This note was uploaded on 04/06/2010 for the course BIO 01-119-10 taught by Professor D'arville during the Fall '09 term at Rutgers.

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Lecture 7 - Fig. 46-4, pg. 993 Basic LayersFig. 46-5, pg....

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