a)Differentiate between absorption and assimilation.
b)What are villi? State its location and functions.
c)State the role of salivary glands in digestion.
Answers
1]Absorption is taking simple molecules, which were produced as a result of digestion into the body (blood stream/lymph) from the intestinal cavity. Assimilation is making new compounds from the absorbed molecules, which are necessary for normal cell functioning or to produce energy.
2]Villi are small finger-like projections located in the walls of the small intestine. Their function is to increase the surface area in order to maximise the absorption of digested food. ... Each villus has a muscle strand which allows the villi to contract and expand.
3]The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. It also helps break down carbohydrates (with salivary amylase, formerly known as ptyalin) and lubricates the passage of food down from the oro-pharynx to the esophagus to the stomach.
Answer:
theriala d..... mannichikkooo