The philtrum is the vertical groves in the upper lip, formed where the nasomedial and maxillary processes meet during embryo development. All information on KidsHealth® is for educational purposes only. Food passes first into a pharynx and digestion occurs extracellularly in the gastrovascular cavity. More recent research, however, shows that in protostomes the edges of the slit-like blastopore close up in the middle, leaving openings at both ends that become the mouth and anus. The lips are soft and fleshy folds which shape the entrance into the mouth.
This page has been produced in consultation with and approved by: The lips and cheeks help hold food in the mouth and keep it in place for chewing. In human anatomythe mouth is the first portion of the alimentary canal that receives food and produces saliva.
The mouths of reptiles are largely similar to those of mammals. Between the epithelium layers are layers of connective tissues, nerves, and muscles. Journal of Applied Physiology.
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Mouth Human anatomy Digestive system Human mouth anatomy. Normally, breathing is performed through the nose. Mouth cancer Smoking increases the risk of mouth cancer six-fold
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