The diagram below shows the human alimentary canal. $1$, $2$, $3$ and $4$ are four different organs that are parts of the canal.
$(i)$ Which of the labelled parts represents the liver?
(ii) Which of the following will be adversely affected in Mr. Ayub's body if his pancreas is malfunctioning, given that the pancreas secretes the lipase enzyme?

What is the role of saliva in the digestion of food?

What are the different modes of nutrition? Explain with one example of each mode of nutrition.

The correct order of steps occurring in nutrition in animals is:

Apart from $CO_2$ and $H_2O$, name four other raw materials which are needed by plants for photosynthesis.

The partially digested food coming from the stomach of a person enters a long and narrow organ $A$ in his body. The organ $A$ receives the secretion of two glands: liver and pancreas. Liver secretes a greenish-yellow liquid $B$ which is normally stored in the organ $C$. Pancreas secretes pancreatic juice which contains three digestive enzymes $D$, $E$ and $F$. The intestinal juice completes the process of digestion of food. The inner wall of organ $A$ has millions of tiny finger-like projections $G$ which help in the rapid absorption of digested food into the blood stream. The undigested part of food then passes into a wider tube $H$ which absorbs most of the water from the undigested food. The last part of tube $H$ called $I$ stores this undigested food (or waste) for some time. The undigested food is then passed out through opening $J$ as faeces in the process known as $K$.
$(a)$ Name the organ $A$.
$(b)$ Name liquid $B$ and organ $C$.
$(c)$ What are the digestive enzymes $D$, $E$ and $F$?
$(d)$ Name the projections $G$ present on the inner wall of organ $A$.
$(e)$ Name tube $H$, part $I$, opening $J$ and process $K$.