It had devoted much to embryology.

它对胚胎学贡献很大。

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.

解剖学家发现将人体个系统（对研究）是有益的，本文将对个系统的主要部作出介绍。

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.

两个原则， 即微小的变异通常出现在生命的不太早的时期，并在相应的不早的时期遗传， 我认为解释了胚胎学中所有上述具体的主要事实。