Embryonic and extraembryonic tissues during mammalian development Biology Diagrams Relating Embryonic Development to the Adult Brain. Embryonic development can help in understanding the structure of the adult brain because it establishes a framework on which more complex structures can be built. First, the neural tube establishes the anterior-posterior dimension of the nervous system, which is called the neuraxis. The
In our article on weeks 1-3 of embryonic development you'll learn that the first stage of development starts off with fertilisation. This is the process of male sperm fusing with the female ovum and it's the basis of the embryology covered in the article. TeachMeAnatomy. Part of the TeachMe Series. The medical information on this site A developing human is referred to as an embryo during weeks 3-8, and a fetus from the ninth week of gestation until birth. In this section, we'll cover the pre-embryonic and embryonic stages of development. 24.4: Fetal Development As you will recall, a developing human is called a fetus from the ninth week of gestation until birth.
14.3: Embryonic Development Biology Diagrams
This page shows some key events of human development during the embryonic period of the first eight weeks (weeks 1 - 8) following fertilization. This period is also considered the organogenic period, when most organs within the embryo have begun to form. Early human development and the chief sources of information on staged human embryos
gestation: in human development, the period required for embryonic and fetal development in utero; pregnancy. human chorionic gonadotropin (hCG): hormone that directs the corpus luteum to survive, enlarge, and continue producing progesterone and estrogen to suppress menses and secure an environment suitable for the developing embryo
Embryonic Development Biology Diagrams
Human embryogenesis is a complicated process by which a fertilized egg develops into an embryo. During the first eight weeks of development, the conceptus shifts from a single-celled zygote into a multi-layered, multi-dimensional fetus with primitively functioning organs. The continued growth and increased intra-embryonic complexity during the first eight weeks of development are highly
