$(a)$ Name the organs which secrete the following enzymes in the human digestive system:
$(i)$ Pepsin
$(ii)$ Salivary amylase
$(iii)$ Trypsin
$(iv)$ Lipase
$(b)$ Name the organs which perform the following functions in the human alimentary canal:
$(i)$ Absorption of digested food
$(ii)$ Absorption of water

(N/A) $(i)$ Pepsin is secreted by the gastric glands present in the stomach wall.
$(ii)$ Salivary amylase is secreted by the salivary glands located in the mouth.
$(iii)$ Trypsin is secreted by the pancreas.
$(iv)$ Lipase is secreted by the pancreas.
$(b)$ $(i)$ The small intestine is the primary site for the absorption of digested food into the bloodstream.
$(ii)$ The large intestine is responsible for the absorption of water and salts from the undigested food material.