The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation. Mucus eases passage of feces through colon.Food residue is concentrated and temporarily stored prior to defecation.Absorbs most residual water, electrolytes, and vitamins produced by enteric bacteria.Bicarbonate-rich pancreatic juices help neutralize acidic chyme and provide optimal environment for enzymatic activity.Pancreas: produces digestive enzymes and bicarbonate.Gallbladder: stores, concentrates, and releases bile.Liver: produces bile salts, which emulsify lipids, aiding their digestion and absorption.Provides optimal medium for enzymatic activity.Performs physical digestion via segmentation.Absorbs breakdown products of carbohydrates, proteins, lipids, and nucleic acids, along with vitamins, minerals, and water.Propels food at a rate slow enough for digestion and absorption.Secretes intrinsic factor required for vitamin B 12 absorption in small intestine.Absorbs some fat-soluble substances (for example, alcohol, aspirin).Releases food into the duodenum as chyme.Mixes and churns food with gastric juices to form chyme.Propels food from the oral cavity to the esophagus.Cleans and lubricates the teeth and oral cavity.Moistens and dissolves food, allowing you to taste it.Begins breakdown of lipids via lingual lipase.Begins chemical breakdown of carbohydrates.Table 1: Functions of the Digestive Organs Organ Section 14 - Special Senses Toggle Dropdown.Chapter 44 - Development of the Male and Female Reproductive Systems.Chapter 43 - Anatomy and Physiology of the Female Reproductive System.Chapter 42 - Anatomy and Physiology of the Male Reproductive System.Section 13 - Reproductive System Toggle Dropdown.Chapter 40 - Divisions of the Skeletal System.Section 12 - Skeletal System Toggle Dropdown.Chapter 39 - Muscle Fiber Contraction and Relaxation.Section 11- Muscular System Toggle Dropdown.Chapter 35 - An Overview of the Endocrine System.Section 10 - Endocrine System Toggle Dropdown.Chapter 33 - Basic Structure and Function of the Nervous System.Section 9 - Nervous System Toggle Dropdown.Chapter 32 - The Urinary System and Homeostasis.Chapter 31 - Gross Anatomy of the Kidney.Section 8 - Urinary System Toggle Dropdown.Chapter 29 - Organs and Structures of the Respiratory System.Section 7 - Respiratory System Toggle Dropdown.Chapter 26 - The Adaptive Immune Response: B-lymphocytes and Antibodies.Chapter 25 - The Adaptive Immune Response: T-lymphocytes and Their Functional Types.Chapter 24 - Barrier Defenses and the Innate Immune Response.Section 6 - Circulatory-Immune System Toggle Dropdown.Chapter 20 - Chemical Digestion and Absorption.Chapter 19 - Accessory Organs in Digestion.Chapter 18 - The Small and Large Intestines.Chapter 16 - Digestive System Processes and Regulation.
#LUMEN DEFINITION BIOLOGY SKIN#
Chapter 15 - Accessory Structures of the Skin.Section 4 - Integumentary System Toggle Dropdown.Chapter 13 - Connective Tissue Supports and Protects.Chapter 12 - Nervous Tissue Mediates Perception and Response.Chapter 4 - Inorganic Compunds Essential to Human Functioning.Chapter 3 - Organic Compounds Essential to Human Functioning.Section 1 - Chemistry of Life Toggle Dropdown.
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