7.3) Mechanical digestion Types of teeth and functions: Incisor - biting off pieces of food Canine - holding and cutting food Premolar - tearing and grinding food Molar - chewing and grinding food Tooth structure: Crown: The part of the...
7.4) Chemical digestion Involves enzymes. Breaking down large molecules to small molecules. The large molecules are usually not soluble in water while the smaller ones are. The small molecules can be absorbed through the epithelium of the alimentary canal, through the...
7.2) Alimentary canal Ingestion: is the taking of substances such as food and drink into the body through the mouth. Mechanical digestion: is the breakdown of food into smaller molecules without chemical change to the food molecules. Chemical digestion: is the...
7.5) Absorption The small intestine is the region where digested food is absorbed. Most absorption happens in the ileum. This is the longest part of the small intestine and is between 2-4 metres long. The small intestine has a large internal surface area for...
7.1) Diet Balance diet: is a diet in which all the components needed to maintain health are present in appropriate proportions. Energy requirements: The amount of energy we need varies. This is due to the following factors: Age Activity levels Gender...