AG 001 Lecture Notes - Lecture 23: Metabolic Water, Vitamin A, Digestion
8 Oct 2020
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Document Summary
Animals are fed for the purpose of production and body maintenance. The edible material given to animals is called food. It is digested, absorbed and utilized in the body. Nutrients are organic and inorganic substances contained in the food materials. Metabolic water (obtained from oxidation of food). Factors determining the requirements of water by livestock. Repair of worn out tissues (body building). In non-ruminants, protein digestion takes placed in the stomach. Food is subjected to mechanical breakdown through chewing into small particles. Protein is acted on by enzymes to turn into amino acid which is assimilated into the bloodstream. In ruminants, protein digestion initially takes place in the rumen. Food is acted on by micro-organisms into microbial protein. Later, enzymatic action takes place in the "true stomach" or abomasum where proteins are broken down into amino acids which are then assimilated into the bloodstream. Excess is stored in form of fat for insulation of the body.
