Human embryonic development or human embryogenesis is the development and formation of the human embryo. It is characterised by the processes of cell division...

identical process occurs in other species. Human embryonic development refers to the development and formation of the human embryo. It is characterised by the...

biology, animal embryonic development, also known as animal embryogenesis, is the developmental stage of an animal embryo. Embryonic development starts with...

the third week of development, the embryonic ectoderm forms a thickened strip called the neural plate. By the fourth week of development the neural plate...

In human embryonic development, a pre-embryo is a conceptus before implantation in the uterus. The word pre-embryo is sometimes used in ethical contexts...

add fluid to semen during ejaculation (pre-ejaculate). The embryonic and prenatal development of the male reproductive system is the process whereby the...

is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life...

stages of embryonic development are the same in all mammals, but later stages of development, and the length of gestation varies. In the human: Different...

cells make up the inner cell mass during the blastocyst stage of embryonic development, around days 5–14. These have stem-cell capability. In vivo, they...

ectoderm—the outermost tissue layer of the embryo. In the third week of human embryonic development the neuroectoderm appears and forms the neural plate along the...

The development of the secondary palate commences in the sixth week of human embryonic development. It is characterised by the formation of two palatal...

fertilized egg called a zygote, initiating embryonic development. Scientists discovered the dynamics of human fertilization in the 19th century. The process...

cap, and cotyledons. Unlike the embryonic development in animals, and specifically in humans, plant embryonic development results in an immature form of...

enables hearing and (in mammals) body balance using the vestibular system. In humans, the ear is described as having three parts: the outer ear, the middle ear...

germinal stage, embryonic stage and fetal stage. Germinal stage begins at conception until 2 weeks; embryonic stage means the development from 2 weeks to...

governed by four overarching laws. These laws were derived from early embryonic development patterns discovered that guide the classification and study of cleavage:...

on early human development, certain genetic disease, and in vitro toxicology testing. According to a 2002 article in PNAS, "Human embryonic stem cells...

folliculogenesis, symptomatic of PCOS. Although DNA methylation in human embryonic development is not fully characterized, the animal model studies on epigenetic...

conductive hearing loss, deafness. Ear development begins in about the third week of human embryonic development, beginning with the formation of the otic...

development, or phylogeny, using incorrectly drawn images of human embryonic development. Whether they were intentionally falsified, or drawn poorly by accident...

The development of the reproductive system is the part of embryonic growth that results in the sex organs and contributes to sexual differentiation. Due...

young, and use of alcohol or tobacco. During the fourth week of human embryonic development, the lateral body wall folds of the embryo meet at the midline...

Type II Keratins are developed before Type 1 keratins during human embryonic development. Type II cytokeratins are encoded on chromosome 12q and encompasses:...

Implantation, also known as nidation, is the stage in the mammalian embryonic development in which the blastocyst hatches, attaches, adheres, and penetrates...

of animals, from the earliest stages of embryonic development to adulthood. The field of neural development draws on both neuroscience and developmental...

bilaminar embryonic disc, bilaminar blastoderm or embryonic disc is the distinct two-layered structure of cells formed in an embryo. In the development of the...

swellings in the neural tube, caudal to the cephalic flexure. In human embryonic development, the rhombomeres are present by day 29. In the early developmental...

2002, he narrated Life's Greatest Miracle, a documentary about human embryonic development. That same year, Lithgow returned to Broadway portraying J. J...

Tooth development or odontogenesis is the complex process by which teeth form from embryonic cells, grow, and erupt into the mouth. For human teeth to...

is the earliest stage of heart development. The heart is the first organ to develop during human embryonic development. From the inflow to the outflow...