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About Carnegie Stage 22 Most embryos at stage 22 are approximately 54 postovulatory days old and measure 25-27 mm in length. Distinguishing criteria for this stage include clear formation of the external ear, the hands begin to extend ventrally beyond the body wall, the fingers of one hand may overlap the fingers of the opposite hand, thickened eyelids just begin to cover the outer margins of the eye, and the superficial vascular plexus of the head now extends about three-quarters of the way above the eye-ear level. |
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| Sample Animations | ||||||||
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| Rotation Animation (650 KB QuickTime file) |
Neural Tube Rotation 1 (328 KB QuickTime file) |
Neural Tube Rotation 2 (650 KB QuickTime file) |
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| Heart Rotation (260 KB QuickTime file) |
Liver Rotation (284 KB QuickTime file) |
Stomach Rotation (272 KB QuickTime file) |
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| Eyes Rotation (260 KB QuickTime file) |
Lungs Rotation (288 KB QuickTime file) |
Suprarenals Rotation (276 KB QuickTime file) |
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| Kidneys Rotation (284 KB QuickTime file) |
Stereo View Rotation (3.4 MB QuickTime file, view cross-eyed) |
Psuedo Timelapse (650 KB QuickTime file) |
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| Optical Images | ||||||||
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| © 2006 Bradley R. Smith | ||||||||