It had devoted much to embryology.

它对胚胎贡献很大。

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.

家发现将人体分成十个系统（对研究）是有益，本文将对个系统主要部分作出介绍。

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.

这两个原则， 即微异通常出现在生命不太早时期，并在相应不早时期遗传， 我认为释了胚胎中所有上述具体主要事实。