Scientists have created the first detailed day-by-day map of human embryo development using single-cell technology.

How did the gut, the skin and musculature evolve? This question concerns scientists for more than a century. Through the investigation of the embryonic development of sea anemones, a very old animal ...

The team observed the emergence of the three-dimensional hematoids under a microscope in the lab. After just a few days these had self-organised into three germ layers - called the ectoderm, mesoderm, ...

Neural crest cells have been thought to originate in the ectoderm, the outermost of the three germ layers formed in the earliest stages of embryonic development. But their capacity to form derivatives ...

Researchers offer a phylogenetic and ontogenetic overview of the primitive streak and its role in mediating amniote (vertebrate animals that develop on land) gastrulation, and discuss the implications ...

News Sea Anemones Illuminate the Evolution of Embryo Development A study of a simple marine animal suggests that the common ancestor of cnidarians and bilaterians may have had three germ layers ...

Proceedings of the National Academy of Sciences of the United States of America, Vol. 118, No. 23 (June 8, 2021), pp. 1-10 (10 pages) Markers for the endoderm and mesoderm germ layers are commonly ...

Reviewed by Michael Greenwood, M.Sc. Fertilization is defined as a process where gametes (an egg and sperm) join together to form a full zygote. Both the sperm and egg contain a single set of 23 ...

Proceedings of the Royal Society of London. Series B, Biological Sciences, Vol. 134, No. 876 (Jul. 2, 1947), pp. 377-398 (30 pages) A critical study and demonstration of the distribution of yolk ...

Huntington’s disease (HD) was the first neurological disorder to be linked to a mutation in a single gene—a discovery made more than 25 years ago. However, neither the pathogenic mechanisms leading to ...