You realize Genesis was written by someone basically uninterested in what we're talking about now but most anxious to, in the words of Peter Enns, bring the glorious past of the ancient Israelites "into their miserable present by means of an official collection of writings"--in other words, preserve the national story of Israel? And that Adam and Eve didn't even exist? Certainly, if you are an early people, talking about the fundamentals of the world, including human anatomy, is a good start but God also made pigeons and goats.