Everything about Mouth Human totally explained
The
human mouth (or
oral cavity) is the first portion of the
alimentary canal that receives food and begins digestion by mechanically breaking up the solid food particles into smaller pieces and mixing them with
saliva.
Function
The mouth plays an important role in
speech (it is part of the
vocal apparatus),
facial expression,
kissing,
eating,
drinking (especially with a straw),
breathing.
Infants are born with a
sucking reflex, by which they
instinctively know to suck for nourishment using their lips and
jaw.
Cultural aspects
According to general
etiquette, the mouth is kept closed, especially when chewing.
Lips are often adorned with
lipstick or
lip gloss although in most human cultures this is an affectation for females only.
Piercings have been made popular by the younger generations. Lip, tongue, and the 'Monroe' (
Monroe piercing is a stud piercing placed on one's face in the same area as Marilyn Monroe's well known and prominent birthmark was) are piercings seen in many varieties. Piercings of any sort besides two subtle earrings are seen as rebellious to the norm in many western cultures.
Development
The
philtrum is the vertical groove in the upper lip, formed where the
nasomedial and
maxillary processes meet during
embryo development. When these processes fail to fuse fully, a
hare lip and/or
cleft palate can result.
The nasolabial folds are the deep creases of tissue that extend from the nose to the sides of the mouth. One of the first signs of age on the human face is the increase in prominence of the nasolabial folds.
Further Information
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