Search Results for: Animal glands
) or internal cavities ( endothelium ) come in numerous shapes and forms – from single layers of flat cells , to cells with small beating hair-like cilia in the lungs, to column-like cells that line the stomach . endothelial cells are cells that line internal cavities including blood vessels and glands
[ ] [ ] [ ] digestive system[ edit ] main article: digestive system the digestive system consists of the mouth including the tongue and teeth , esophagus , stomach , ( gastrointestinal tract , small and large intestines , and rectum ), as well as the liver , pancreas , gallbladder , and salivary glands...
https://en.wikipedia.org/wiki/Human_body