The stomach uses peristalsis and pepsin to aid digestion.
yes some bacteria help aid digestion
it doesn't
Yes.
They aid digestion in the same manner as dermal ridges aka: fingerprints aid in gripping. The same as ridges on the sole of a shoe aids traction.
They aid in digestion
Every part of the mouth aids in digestion. This includes the tongue and teeth. The mouth is responsible for the first part of digestion.
Sedative, to aid digestion, and as an antibiotic.
aid in fertilization by extracellular digestion
sea lion
Large intestine
To aid in the digestion of nutrients consumed by the pig.