The yolk sac is also the first site of hematopoeisis, with embryonic red blood cells and macrophages visible in the yolk sac as early as 2 weeks' gestation. Neutrophils, platelets, and lymphocytes ...

A shark expert, whose own curiosity about these fascinating fish was sparked by the movie "Jaws," explains some of their ...

Chinese researchers are preparing the details for the publication of another scientific milestone, the creation of a chimera with a human heart and a kidney developed from human stem cells in pig ...

Pig embryo at 33 days. Pig embryos with human heart cells have survived for 21 days. Credit: Daniel Sambraus/Science Photo Library Researchers have reported growing hearts containing human cells ...

Human-animal embryo research in Japan explores the possibility of growing human organs inside animals. Credit: Lunar caustic / CC BY 2.0 Japan became the first country to approve human-animal embryo ...

Japan became the first country to approve human-animal embryo research involving the growth of human cells inside animal embryos in 2019, allowing them to be implanted into surrogate animals. This ...