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. (December 2009)
In anatomy, a fissure (Latin fissura, plural fissurae) is a groove, natural division, deep furrow, elongated cleft, or tear in various parts of the body. It is also generally called a sulcus, but this term can also reffer specifically to the analagous brain structure.
- Fissure (dentistry), a break in the tooth enamel
- Anal fissure, a break or tear in the skin of the anal canal
- Fissure of the nipple, a condition that results from running, breastfeeding and other friction-causing exposures
- Fissured tongue, a condition characterized by deep grooves (fissures) in the tongue
- Henle's fissure, a fissure in the connective tissue between the muscle fibers of the heart
- Palpebral fissure, separates the upper and lower eyelids
- Skin fissure, a linear-like cleavage of skin, sometimes defined as extending into the dermis
- Ventral median fissure, of the spinal cord
Fissure can also refer to an unnatural tract or ulcer, most commonly found in the anus and called an anal fissure.