Information about Meatuses

Anatomy (from the Greek ἀνατομία anatomia, from ἀνατέμνειν
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A body orifice is an opening in the body of an animal. In a typical mammalian body such as the human body, the body orifices are:

• The nostrils, for breathing and the associated sense of smell.
• The eyes, for the sense of sight and crying.

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Auditory meatus can refer to:

• external auditory meatus
• internal auditory meatus

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The ear canal (external auditory meatus, external acoustic meatus), is a tube running from the outer ear to the middle ear. The ear canal extends from the pinna to the eardrum and is about 26 mm in length and 7 mm in diameter.
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The urinary meatus is the external orifice of the urethra, from which urine is ejected during urination.
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In anatomy, the urethra is a tube which connects the urinary bladder to the outside of the body. The urethra has an excretory function in both genders to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
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The glans penis (or simply glans) is the sensitive tip of the penis. It is also commonly referred to as the "head" of the penis. Slang terms include "helmet" and "bell end".
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The external genital organs of the female are collectively known as the vulva (plural vulvae or vulvas)^[1]. In common speech, the term vagina
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The superior meatus, the smallest of the three meatuses of the nose, occupies the middle third of the lateral wall.

It lies between the superior and middle nasal conchæ; the sphenopalatine foramen opens into it behind, and the posterior ethmoidal cells in front.
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The middle meatus is situated between the middle and inferior conchæ, and extends from the anterior to the posterior end of the latter.

The lateral wall of this meatus can be satisfactorily studied only after the removal of the middle concha.
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The inferior meatus, the largest of the three meatuses of the nose, is the space between the inferior concha and the floor of the nasal cavity.

It extends almost the entire length of the lateral wall of the nose, is broader in front than behind, and presents anteriorly the
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The mucous membranes (or mucosae; singular: mucosa) are linings of mostly endodermal origin, covered in epithelium, and are involved in absorption and secretion. They line various body cavities that are exposed to the external environment and internal organs.
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Urethral meatal stenosis is a narrowing (stenosis) of the opening of the urethra at the external meatus, thus constricting the opening through which urine leaves the body from the urinary bladder.
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