Which Layer of the Wall of the Digestive Tract Contains

Question

Which layer of the wall of the digestive tract contains blood vessels and nerves?
A) serosa
B) submucosa
C) muscularis
D) mucosa

Accepted Answer

The submucosa layer of the digestive tract contains blood vessels, lymphatic vessels, and nerves that supply the overlying mucosa layer with nutrients and oxygen. This layer also contains submucosal glands that secrete mucus, enzymes, and hormones to aid in digestion. The other layers of the digestive tract (muscularis and serosa) do not contain significant blood vessels and nerves.