Normally, the neural crest cells crawl through the embryo and form a strip running along the back.
The middle germinal layer of an early embryo, consisting of undifferentiated cells destined to become the mesoderm.
Since the first trimester is such a vulnerable period for the embryo many doctors also advise against coloring your hair during that time.
Methods Hepatocytes obtained from the new born rabbit were cultured on the AGAR scaffold made up of AGAR, embryo cattle strum and antibiotics, then observed the growth and proliferation of the cells.
How will the embryo respond?
But a salamander embryo can attract algae. Inside its tissues and cells.
And molecular markers show that the five true fingers develop together in a mole embryo, with the outsized sesamoid cropping up later.
Two research teams in the US and Japan have made embryonic stem cells – or something very like them – directly from human skin cells, without having to destroy an embryo in the process.
What is cancerous embryo antigen?
This logarithmic increase suggests that algae associated with the salamander embryos either divide rapidly as the embryo develops, or quickly enter the jelly or the embryo from outside as it grows.
All above indicated that the DES could inhibit the proliferation of orchic cells in embryo, then influenced the testicle development, damaged the testicle structure.
From the curl of a ram's horn to patterns of spider webs and the development of an embryo, Mr Ball examines the possible causes of the shapes and forms we observe.
First, the heart of an embryo starts off as a little tube, similar to the heart of a goldfish.
Reptiles have placodes too. But in a reptile embryo each placode switches on genes that cause only the skin cells on the back edge of the placode to grow, eventually forming scales.
How the simple symmetry and its breaking evolves during the growth of the embryo is intriguing.
A handful of genes that are normally active in the developing embryo are expressed in a differentiated cell, such as a skin cell, causing that cell to revert back to its undifferentiated state.
Researchers made this connection after discovering a 380-million-year-old female specimen that still retained a single embryo connected by an umbilical cord.
Every month, the uterus builds up a lining of tissue called the endometrium, where an embryo can implant and grow.
Having the wrong number of chromosomes can cause an embryo to miscarry, or lead to serious medical conditions such as Down's syndrome.
They are now trying toimplant the embryo into a host animal.
The placenta is fully functional by now carrying nourishment to the embryo and carrying waste away.
國文精選館
