What do you mean by the process of digestion?

Name the process by which swallowed food is conveyed to the pharynx and oesophagus,respectively.

Select the correct option for $Amylase$.
$I-$ Acts in the oral cavity at $pH$ $6.8$.
$II-$ Acts in the small intestine at $pH$ $7.8$.
$III-$ Converts polysaccharides into monosaccharides.
$IV-$ $Amylase$ is a hydrolytic enzyme.
$V-$ $Amylase$ also acts as an antibacterial agent.

Human symbiotic bacteria help in

Which enzyme gets activated by $HCl$,secreted from gastric glands?

Give the composition and function of gastric juice.