Natal cleft

Definition
noun
(1) The cleft or sulcus as a result of the anchoring of the deep layers of the skin to the anococcygeal raphe and the dorsum of the coccyx up to the tip of the sacrum.
(2) The groove or crack between the buttocks that runs from below the sacrum to the perineum; or the groove in which the anus is situated.
(3) The cleft or groove as if forming a visible border between the masses of the gluteus maximus muscle.
Supplement
Synonym: gluteal cleft, anal cleft.

Geological Periods

Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

Mātauranga Māori and Science

Mātauranga Māori is the living knowledge system of the indigenous people of New Zealand, including the relationships t..

Types and Causes of Brain Damage

This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

Peppered moth ("Biston betularia") melanic and light form

Examples of Natural Selection

Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

Passive and Active Types of Immunity

Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..

Neural Control Mechanisms

Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..