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Image:
The diagram corresponds with a cut made at the level of the white line on the micrograph.

 

The space containing the heart (pericardial cavity) and the lungs (pleural cavities) is separated by tissue termed the pleuropericardial folds that extend inward from the body wall.

 
                     Species: Mouse 
                     Day Gestation: 15 
             Approx. Human Age: 9 weeks 
                                   View: Lateral 
           Body Cavities (Late Week 4)
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