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THE HUMAN BODY - PowerPoint

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					Body Cavities
   2 Body Cavities, chapter 1.
     Dorsal (posterior)
       Cranial
       Vertebral or spinal
Body Cavities
2 Body Cavities cont’d
   Ventral (anterior) – 2 sections divided by the diaphragm
     Thoracic
         Pleural – R and L
         Mediastinum = superior +*pericardial
     Abdominopelvic
         Abdominal: stomach, intestines, spleen, liver, etc.
         Pelvic: urinary bladder, some reproductive organs, rectum
         Peritoneal (“perry-toe-neel”)
Figure 1.9
Body Cavities
 Retroperitoneal Cavity
   Outside the peritoneal membranes.
   Organs considered retroperitoneal:
      Kidneys
      Adrenal glands
      Pancreas
      Duodenum
      Ascending and descending colons
      Parts of the abdominal aorta and inferior vena cava
Serous Membranes
 Membranes (serosa) – occur only in the ventral body
  cavities not open to the exterior of the body.
 2 membrane layers with serous fluid between.
   Layer lining the cavity wall = parietal.
   Layer on the surface of the organ = visceral.
   Fluid reduces friction when organs move.
   Inflammation??
Figure 1.10
Serous Membranes
   Membranes (serosa) of the ventral body cavity:
     Specific
       Lungs – pleura, p. 139 & 819
       Heart – pericardial, p.17,139, & 663
       Abdomen – peritoneum, p. 139 & 892
       Fluids – pleural, pericardial, peritoneal
Serous Membranes
 Mesothelium – squamous epithelium found in serous
  membranes lining the ventral cavity and covering its
  organs.
 Mesentery – folds of the peritoneum.
   Fan-shaped and binds parts of the small intestine to each other
    and the posterior abdominal wall.
   Extends from posterior abdominal wall to wrap around the
    small intestine and then returns to its origin forming a double
    layered structure.
   Between the layers are blood vessels and lymphatics.
Serous Membranes
   Mesentery - Greater Omentum
     Largest peritoneal fold
     Drapes over the transverse colon and coils of the small intestine
      like a fatty apron – folds on itself.
   Mesentery - Lesser Omentum
     Suspends the stomach and duodenum from the liver.
Body Planes and Sections
 Plane – flat surface along a cut or section of the body or
  object.
 See pp. 15-16
Figure 1.8
Other planes
 Parasagittal
 Oblique
 “Cross section”

				
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