Source: Human Fertilization image, Creative Commons: http://bit.ly/SR36Ri; Ectoderm image, Creative Commons: http://bit.ly/SXChNK; Mesoderm image, Public Domain: http://bit.ly/T0ycJF; Endoderm image, Public Domain: http://bit.ly/TBKgML
After the morula forms, each new cell that divides is called a blastomere.
The process of cells taking on specific forms and functions, also called specialization of cells.
A general term to describe the splitting or breaking apart of an object or molecule; in embryology this is when the zygote starts to divide into multiple cells.
The outer germ layer that forms the nervous system, skin, melanocytes and lenses of the eyes.
The innermost germ layer that forms the digestive tract, respiratory tract, endocrine glands, auditory systems, and urinary bladder.
The first three layers of tissue that develops in the embryo as it starts to form (ectoderm, mesoderm, and endoderm).
The middle germ layer that forms muscles (cardiac, smooth, skeletal), mesenchyme, blood vessels, and mesenteries.
When an organism develops a specific shape.