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The nasolabial folds, commonly known as "smile lines" [1] or "laugh lines", [2] [self-published source] are facial features. They are the two skin folds that run from each side of the nose to the corners of the mouth. They are defined by facial structures that support the buccal fat pad. [3] They separate the cheeks from the upper lip.
Facial expression is also used in sign languages to show adverbs and adjectives such as distance or size: an open mouth, squinted eyes and tilted back head indicate something far while the mouth pulled to one side and the cheek held toward the shoulder indicate something close, and puffed cheeks mean very large.
Information includes both science and education, such as anatomical drawings. Any ambiguous image not easily fitting into one of these categories may be misinterpreted, leading to disputes. [62] The most contentious disputes are between fine art and erotic images, which define the legal distinction of which images are permitted or prohibited.
Surface anatomy, or superficial anatomy, is the study of anatomical landmarks that can be identified readily from the contours or other reference points on the surface of the body. [1] It is important in human anatomy: with knowledge of superficial anatomy, physicians gauge the position and anatomy of deeper structures.
The face is the front of an animal's head that features the eyes, nose and mouth, and through which animals express many of their emotions. [1] [2] The face is crucial for human identity, and damage such as scarring or developmental deformities may affect the psyche adversely.
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A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile. Among humans, a smile expresses delight, sociability, happiness, joy, or amusement.
So we can learn more about a dog’s smile and what it could mean, Juliana DeWillems, the owner and head trainer at JW Dog Training & Behavior, has offered some examples in a recent Instagram post ...