Information about Orifice

Mammalia
Linnaeus, 1758

Subclasses & Infraclasses

• Subclass †Allotheria*
• Subclass Prototheria
• Subclass Theria

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The human body is the entire physical structure of a human organism. The human body consists of a head, neck, torso, two arms and two legs. The average height of an adult human is about 1.6 m (5 to 6 feet) tall. This size is largely determined by genes.
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nostril (or naris, pl. nares) is one of the two channels of the nose, from the point where they bifurcate to the external opening. In birds and mammals, they contain branched bones or cartilages called turbinates, whose function is to warm air on inhalation and
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Breathing transports oxygen into the body and carbon dioxide out of the body. Aerobic organisms require oxygen to create energy via respiration, in the form of energy-rich molecules such as glucose. The medical term for normal relaxed breathing is eupnoea.
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Olfaction (also known as olfactics) refers to the sense of smell. This sense is mediated by specialized sensory cells of the nasal cavity of vertbrates, and, by analogy, sensory cells of the antennae of invertebrates.
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Eyes are organs of vision that detect light. Different kinds of light-sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors.
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Sight may refer to one of the following:

• Visual perception
• Sight, a device used to assist aim by guiding the eye.

In literature

• The Sight, the first book of the Warriors:Power of Three novel series by Erin Hunter.
• The Sight, a book about wolves.

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Crying may refer to:

• Tears
• Sadness
• Crying The Neck a harvest festival.

Songs:

• Crying (song), sung by Roy Orbison
• Cryin', recorded by Aerosmith

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mouth, also known as the buccal cavity or the oral cavity, is the orifice through which an organism takes in food and water.

Location

In all mammals, the mouth is forward-facing in the face. Non-mammals have mouths in other locations (e.g.
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eating (formally, ingestion) is the process of consuming nutrition, i.e. food, for the purpose of providing for the nutritional needs of an animal, particularly their energy requirements and to grow.
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Speech communication refers to the processes associated with the production and perception of sounds used in spoken language. A number of academic disciplines study speech and speech sounds, including acoustics, psychology, speech pathology, linguistics, and computer science.
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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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Hearing (or audition) is one of the traditional five senses, and refers to the ability to detect sound. In humans and other vertebrates, hearing is performed primarily by the auditory system: sound is detected by the ear and transduced into nerve impulses that are perceived
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anus (from Latin ānus "ring, anus") is the external opening of the rectum. Closure is controlled by sphincter muscles. Feces are expelled from the body through the anus during the act of defecation, which is the primary function of the anus.
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Defecation is the act or process by which organisms eliminate solid or semisolid waste material (feces) from the digestive tract via the anus. Humans expel feces anywhere from a few times daily to a few times weekly; sloths can go a week without expelling.
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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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Urination, known by physiologists as micturition, or more simply as voiding, is the process of disposing urine from the urinary bladder through the urethra to the outside of the body.
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Male (♂) refers to the sex of an organism, or part of an organism, which produces small mobile gametes, called spermatozoa. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilisation.
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Ejaculation is the ejecting of semen from the penis, and is usually accompanied by orgasm. It is usually the result of sexual stimulation, which may include prostate stimulation. Rarely, it is due to prostatic disease.
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Female (♀) is the sex of an organism, or a part of an organism, which produces ova (egg cells). The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon is produced by the male.
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The vagina, (from Latin, literally "sheath" or "scabbard" ) is the tubular tract leading from the uterus to the exterior of the body in female placental mammals and marsupials, or to the cloaca in female birds, monotremes, and some reptiles.
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Sexual intercourse or copulation is the union of the sex organs of two sexually reproducing animals.^[1] The two entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails.
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Menstruation is a phase of the menstrual cycle in which the uterine lining (endometrium) is shed. Menstrual cycles occur exclusively in humans and other apes.^[1]
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Childbirth (also called labour, birth, partus or parturition) is the culmination of a human pregnancy or gestation period with the delivery of one or more newborn infants from a woman's uterus.
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breast refers to the upper ventral region of an animal’s torso, particularly that of mammals, including human beings. The breasts of a female mammal’s body contain the mammary glands, which secrete milk used to feed infants.
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cloaca is the posterior opening that serves as the only such opening for the intestinal, urinary, and (usually) genital tracts of certain animal species. The word comes from Latin, and means "sewer".
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The term siphon is used for a number of biological structures, either because flowing liquids are involved or because the object is shaped like a siphon. In these structures, the physical phenomenon known as the siphon effect is not present.
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Cephalopoda
Cuvier, 1797

Orders

Subclass Nautiloidea

• †Plectronocerida
• †Ellesmerocerida
• †Actinocerida
• †Pseudorthocerida
• †Endocerida
• †Tarphycerida
• †Oncocerida

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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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A mucocutaneous zone is a region of skin comprising both mucosa and cutaneous skin. These mostly occur near the orifices of the body at which the external skin stops and the mucosa that covers the inside of the body starts.
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