HomeHHMI's BioInteractiveHuman Embryonic Development


Free Resources for Science Education

Human Embryonic Development

Human embryonic development depends on stem cells. During the course of development, cells divide, migrate, and specialize. Early in development, a group of cells called the inner cell mass (ICM) forms. These cells are able to produce all the tissues of the body. Later in development, during gastrulation, the three germ layers form, and most cells become more restricted in the types of cells that they can produce.

Download this item

Related Scientists


Additional Materials

Bulletin Article
Bulletin Article