2.Anatomy is the study of the body's structure; physiology is the study of the body's function. Other studies of human body include cytology, embryology, histology, immunology, endocrinology, hematology, biology, psychology etc.
3.These two principles, namely, that slight variations generally appear at a not very early period of life, and are inherited at a corresponding not early period, explain, as I believe, all the above specified leading facts in embryology.