2. Human Digestive System
Carries food from thick muscular wall adapted for transport
mouth to stomach not digestion
oesophagus stomach small intestine
muscular sac inner layer produces involved in storing and
enzymes digesting food
proteins digested here glands produce mucus long muscular tube
mucus prevents food digested by the inner walls are
enzymes digesting this enzymes produced in folded into villi
organ walls and by glands
that pour secretions in
villi produce a large surface area of villi this increase of surface
surface area increased by microvilli area means this organ
on epithelial cells of is adapted for
each villus absorbing products of
digestion into blood
stream
Large Intestine Rectum Salivary glands
Pancreas water is absorbed here found near the mouth
food that leaves here is faeces are stored reabsorbed water
dry and thick and forms before being mostly comes from
faeces periodically expelled by secretions of digestive
anus through egestion glands
pass secretions through secretions contain the amylase breaks down
a duct into the mouth enzyme amylase starch to maltose
this is a large gland produces pancreatic this secretion contains
found below the juice proteases to digest
stomach proteins, lipase to
digest lipids and
amylase to digest
starch
