Human beings are almost, but not quite, bilaterally symmetric. From the outside it appears as if our left and right sides are mirror images of each other but there are asymmetries in some of the internal organs; for example, there is only one appendix, on the right side; the heart and the big blood vessels emerging from it are asymmetrical. This is also relevent for the liver, gall bladder, and pancreas.
- Wile, Dr. Jay L. Exploring Creation With Biology. Apologia Educational Ministries, Inc. 1998