(v) (a) Draw the digestive system. Explain the roles of glands associated with it.
(b) Draw the respiratory system showing clearly the path of air from atmosphere to the lungs.
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The digestive system comprising of the gastro intestinal tract of the body plus the accessory organs of digestion which helps in aiding the digestive process of the organisms. Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body because of the simplicity of the components. The process of digestion has several stages involve in it.
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