Body Cavities and Subdivisions

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19 Terms

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Cranial Cavity

Where the brain is enclosed within the skull.

<p>Where the brain is enclosed within the skull. </p>
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Vertebral cavity

Where the spinal cord is protected in the vertebral column.

<p>Where the spinal cord is protected in the vertebral column. </p>
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Thoracic Cavity

Where the heart and lungs (protected by the ribcage) are housed.

<p>Where the heart and lungs (protected by the ribcage) are housed. </p>
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Abdominal Cavity

Houses the stomach, liver, intestines, and other organs.

  • Superior to the pelvic cavity.

  • Part of the abdominopelvic cavity (divided into anatomical left and right quadrants).

  • Also divided into nine regions.

<p>Houses the stomach, liver, intestines, and other organs.</p><ul><li><p>Superior to the pelvic cavity.</p></li><li><p>Part of the abdominopelvic cavity (divided into anatomical left and right quadrants).</p></li><li><p>Also divided into nine regions.</p></li></ul><p></p>
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Pelvic Cavity

Houses the reproductive organs, bladder, and rectum—all partially enclosed by the pelvic bone.

  • Inferior to the abdominal cavity.

  • Part of the abdominopelvic cavity (divided into anatomical left and right quadrants).

  • Also divided into nine regions.

<p>Houses the reproductive organs, bladder, and rectum—<strong><mark data-color="red" style="background-color: red; color: inherit"><u>all partially enclosed by the pelvic bone.</u></mark></strong></p><ul><li><p>Inferior to the abdominal cavity.</p></li><li><p>Part of the abdominopelvic cavity (divided into anatomical left and right quadrants).</p></li><li><p>Also divided into nine regions.</p></li></ul><p></p>
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Serosa or Serous membrane

The walls of the ventral body cavity and the organs' outer surfaces are coated with this.

  • Produces a thin lubricating fluid that allows the visceral (internal) organs to slide over one another/the body wall without friction.

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Parietal serosa

Part of the membrane lining the cavity walls.

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Visceral serosa

Part of the membrane that covers the external surface of the organs.

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Umbilical region

The centermost region of the abdominopelvic region.

<p>The centermost region of the abdominopelvic region. </p>
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Epigastric region

Immediately superior to the umbilical region; overlies most of the stomach.

<p>Immediately superior to the umbilical region; overlies most of the stomach. </p>
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Hypogastric (pubic) region

Immediately inferior to the umbilical region; encompasses the pubic area.

<p>Immediately inferior to the umbilical region; encompasses the pubic area. </p>
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Iliac (inguinal) regions

Lateral to the hypogastric region, overlaying the superior parts of the hip bones.

<p>Lateral to the hypogastric region, overlaying the superior parts of the hip bones. </p>
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Lumbar regions

Between the ribs and the flaring parts of the hip bones; superior to the iliac regions.

<p>Between the ribs and the flaring parts of the hip bones; superior to the iliac regions. </p>
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Hypochondriac regions

On the left and right of the epigastric region; superior to the lumbar regions.

<p>On the left and right of the epigastric region; <strong><mark data-color="red" style="background-color: red; color: inherit"><u>superior to the lumbar regions.</u></mark></strong></p>
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Oral cavity

AKA the mouth; contains the tongue and the teeth and is continuous with the rest of the digestive tube, which opens to the exterior of the anus.

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Nasal cavity

Located within and posterior to the nose; it is part of the passages of the respiratory system.

<p><strong><mark data-color="red" style="background-color: red; color: inherit"><u>Located within and posterior to the nose</u></mark></strong>; it is part of the passages of the respiratory system. </p>
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Orbital cavities

Houses the eyes and presents them in an anterior position.

<p><strong><mark data-color="red" style="background-color: red; color: inherit"><u>Houses the eyes</u></mark></strong> and presents them in an anterior position. </p>
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Middle ear/tympanic cavities

Lie medial to the eardrums and is carved into the skull.

  • Contain tiny bones that transmit sound vibrations to the organ of hearing.

<p>Lie medial to the eardrums and is carved into the skull. </p><ul><li><p>Contain tiny bones that transmit sound vibrations to the organ of hearing. </p></li></ul><p></p>
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Synovial cavities

Joint cavities that are enclosed within fibrous capsules that surround the movable joints of the body.

  • Membranes lining these cavities secrete a lubricating fluid that reduce friction as the structures move across each other.

<p>Joint cavities that are enclosed within fibrous capsules that surround the movable joints of the body. </p><ul><li><p>Membranes lining these cavities secrete a lubricating fluid that reduce friction as the structures move across each other. </p></li></ul><p></p>