Learn the definition of what is the embryonic stage. Understand what is embryonic development and what happens during the embryonic period.

Learn about the stages of embryonic development. Discover the embryology definition, the embryological development definition, and human embryo stages.

Learn about the stages of prenatal development. Discover the order of the stages and the events of the germinal stage, embryonic stage, and fetal stage.

This lesson discusses the four major types of tissues: epithelium, connective tissue, muscle, and nervous tissue, and their embryological origins and functions.

The embryonic stage ends when: a) the developing organism attaches itself to the uterine wall. b) bone cells begin to appear. c) the major structures of the body are formed. d) all of the internal …

Explore the embryonic stage of human development in our bite-sized video lesson. Learn the characteristics of this early stage and take an optional quiz!

Practice Identifying Similarities between Embryonic Forms to Determine Evolutionary Relationships with practice problems and explanations. Get instant feedback, extra help and …

What is a cotyledon? Learn the cotyledon definition, cotyledon function, and about the two-leaf plants known as dicots and single-leaf plants known as monocots.

The difference between the embryonic and fetal period has to do with cellular growth, development, and structure. During the embryonic period, organs are growing and developing …

Fetal development in the first trimester occurs in stages with new organs forming about every four weeks. Explore the first trimester timeline and learn about embryogenesis, cell differentiation ...