During which prenatal developmental period do the following changes take place? Eyes appear, four chambers of the heart take shape, spinal cord begins to form, and the intestinal tract develops.

Question

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The changes listed all occur during the embryonic period, which lasts from the end of the germinal period (conception until 2 weeks) until the end of the eighth week of pregnancy. This is when the most rapid development occurs and the basic structures of the body begin to form.

During Which Prenatal Developmental Period Do the Following Changes Take