Digestion And Absorption

Argentaffin cells are located in deep parts of principal (fundic) glands found in the fundus part of stomach. These cells secrete gastrin, motilin, serotonin, somatostatin, histamine and -hydroxytryptamine.

Answer (d) Stomach

The saliva is a colour less, opalescent and sticky liquid produced by the salivary glands in the quantity about (cubic decimeter), i.e., $1.5\, L/ day.

Vitamins- and are fat-soluble in nature whereas, vitamin- and are water-soluble in nature.

Vermiform appendix is found at the end of caecum (a part of alimentary canal). It is a blind ended tube connected to the caecum, from which it develops embryogenically.