Usually in the fallopian tubes, immediately after fertilization.
The formation of a human embryo is complete by the end of the eighth week of pregnancy. At this stage, all major organs and systems have formed, and the embryo is then referred to as a fetus.
The 10th week
embryo formation
Embryo (Greek embryon = a young one) refers to a human baby in its first trimester. During this time histogenesis (tissue formation) and organogenesis (organ formation) is taking place.
Fetus is name given to human embryo after it is recognizable as human embryo .
The male's sperm cell combines with the female egg or ovum; fertilizes it and is the start of embryo formation.
Osseous tissue (probably answer "D" on your worksheet)
VEGF
If a human egg (from the female) and a human sperm (from the male) join together, then the egg is fertilised by the sperm and a human embryo is created. This human embryo grows over 9 months into a baby.
Ectoderm
The same way that a human embryo or any other mammalian embryo does.
The human embryo is implanted into the wall of the uterus.
The embryo that does not have an amnion is the human embryo. It is a membrane that covers the embryo when first formed. Mammals, reptiles and birds have this feature.
A. Gastrulation B. Embryogenesis