Body Cavities

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Body Cavities

• 2 major cavities
• Ventral cavities
• Dorsal cavities
• Other cavities oral, nasal, orbital, middle ear,
  synovial

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Dorsal Cavity

• Posterior region of body
• 2 regions
• Cranial cavity (skull) supports and protects
  brain
• Vertebral (spinal) Cavity supports and protects
  spinal cord

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Ventral Cavities

• Anterior region of trunk
• Serosa thin membrane that covers the wall of
  cavity and outer surface of its organs
• Parietal serosa lines cavity wall
• Visceral serosa covers organ

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Ventral Cavities cont.

• 2 regions
• 1)Thoracic cavity subdivided
• contains lungs, heart, trachea, esophagus,
  thymus, lymph nodes
• Region between lungs mediastinum

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Ventral Cavities cont.

• 2 regions
• 2)Abdominopelvic cavity subdivided
• A) Abdominal cavity superior portion of
  abdominopelvic cavity
• Stomach, intestine, spleen, liver
• B) Pelvic cavityinferior to abdominal cavity
  bladder, reproductive organs, rectum
• Serosa is called peritoneum

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Other Cavities (Smaller Cavities)

• Oral teeth tongue
• Nasal within nose left and right side divided
  by nasal septum
• Orbital contains eyes associated muscles and
  nerves
• Middle ear contains ossicles (ear bones)

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Planes of Section
Transverse Section
Coronal Section
Sagittal Section
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Transverse Section (Plane)(Cross-Section)

• Runs horizontally at right angle to the vertical
  axis
• It divides the structure into superior and
  inferior regions

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Sagittal Section (Plane)

• Runs longitudinally (lengthwise) and divides the
  body into left and right regions
• Midsagittal (median section) cut is made down
  the median plane of body and left and right parts
  are equal in size

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Coronal (Frontal) Section (Plane)

• Runs longitudinally but at a right angle to
  sagittal plane
• It divides the body into anterior and posterior
  regions

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Directional Terms
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Directional Terms
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Directional Terms
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Directional Terms
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Directional Terms
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Anatomy

• Study of structure of the body relationship of
  its parts
• Subdivisions
• Gross Anatomy study of anatomic structures
  visible to unaided eye
• Descriptive Anatomy study of individual body
  parts in an ordered fashion. i.e. nervous system
• Regional Anatomy study of limited portions or
  region of the body. i.e. head neck region

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Anatomy Subdivisions cont.

• Applied Anatomy application of anatomic findings
  to diagnosis treatment of medical disorders
• Comparative Anatomy comparison of the structure
  of different animals and plants
• Pathologic Anatomy study of abnormal, diseased
  or injured tissue

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Anatomy Subdivisions cont.

• Microanatomy study of anatomic structures using
  a microscope
• Cytology study of cellular structure
• Molecular biology study of structures at
  subcellular level
• Histology microscopic study of tissues

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Anatomy subdivisions cont.

• Developmental Anatomy Study of structural
  changes from conception
• 2 subdivisions
• Embryology study of developmental changes before
  birth
• Gerontology study of structural changes that
  accompany aging

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Cell Diversity
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