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Function of digestive system 1. Ingestion: taking food into mouth. 2. Secretion: release of water, acid, buffers, and enzymes into lumen of GI tract. 3. Mixing and propulsion: churning and movement of food through GI tract. 4. Digestion: mechanical and chemical breakdown of food. 5. Absorption: passage of digested products from GI tract into blood
6.1.1 Why digest food? Food consists of: Carbohydrates. Lipids. Proteins. Nucleic acids. Minerals. Vitamins . Water. These are large, insoluble polymer molecules. They must be digested into monomers small enough to pass through the cell membrane of the cells lining the digestive tract so they can be absorbed in to the blood stream.
The liver, pancreas, and gallbladder are the solid organs of the digestive system. The digestive system helps the body digest food. Bacteria in the GI tract, also called gut flora or microbiome, help with digestion. Parts of the nervous and circulatory systems also play roles in the digestive process.
The digestive system is where we eat and digest food break it down (digest it), send the usable parts through the blood to the body organs and tissues and get rid of the waste that the body can’t use.
Human Digestive System Anatomy Objectives: 1. Learn the anatomy of the digestive system. You should be able to find all terms in bold on the human torso models. 2. Relate structure of the system to some of its functions. I. Introduction: Some terms used to describe the relative positions of body parts are used
Trace the pathway traveled by ingested meal in human digestive system and describe step-by-step digestion of carbohydrate, protein and lipid. Describe the mechanism of the absorption of carbohydrate protein and lipid by intestinal villus, their fate and roles in human body.
The system by which ingested food is acted upon by physical and chemical means to provide the body with absorbable nutrients and to excrete waste products is called digestive system. OR The organs involved in the breakdown of food—collectively called the digestive system.