1. Differentiate the outer tube from the inner tube. Identify three structures that are located in the outer tube and three that are located in the inner tube.
2. Your friend points out in anatomy class that by the end of the eight week, an embryo’s digits appear to be webbed, just like a duck’s. Is she correct?
3. When is the earliest time the sex of a fetus can be determined using ultrasound examination?
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