Implantation and Development of the Embryo

What is the primary function of the trophoblast enzymes during implantation?

By the end of which week does the embryonic disc form the cylindrical neural tube?

What is the term for the process of the formation of organs from the three primary germ layers?

Which layer of the embryonic disc gives rise to the nervous system?

What is the stage of development characterized by a solid ball of cells?

During which stage does the inner cell mass flatten to form the embryonic disc?

What is the term for the movement of cells in the embryonic disc to form multiple layers?

Which primary germ layer produces the epithelial linings of the digestive tract and respiratory tract?

What is the stage of development characterized by a hollow ball consisting of the trophoblast and inner cell mass?

During which stage does the heart start beating and limb buds form?

During which stage of development does the mass of cells divide rapidly and become smaller?

What is the term for the solid ball of approximately 16 cells that forms after cleavage?

Which stage of development is characterized by the formation of the placenta and major organs?

What is the term for the process of change through lifespan?

During which stage of development does the inner cell mass organize into the embryoblast?

What is the term for the hormone secreted by the trophoblast during implantation?

What is the term for the structure that forms from cells that surround the embryo and cells from the endometrium?

During which stage of development does the zygote move down the uterine tube?

What is the term for the process of fertilization resulting in the formation of a zygote?

What is the term for the stage of development that lasts from fertilization to the 8th week?

What is the term for the stage of development that begins at the end of the 8th week and lasts until birth?

By the end of which week are external reproductive organs distinguishable as male or female?

During which month does the body grow quickly, and the lower limbs lengthen?

What happens to the skin during the 6th month of fetal development?

During which trimester do brain cells form rapidly, and organs mature as the fetus greatly increases in size?

How many days after fertilization is a baby typically full-term and ready for birth?