Anatomy and Physiology

The single layer of cells that surrounds the blastocele is the

Fusion of the male and female pronuclei

The clinical age of the unborn child is calculated from

What event separates childhood from adolescence?

The inner cell mass of the blastocyst

The period from conception until birth is

Developmental events are calculated from

At the time of implantation, the human embryo is in a stage of development known as the

If a woman ovulates two oocytes and both are fertilized,

The prenatal period during which the major organ systems form is the

The placenta and membranes surrounding the embryo develop from the

Fusion of the male and female pronuclei forms the

Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin 61. This is called the

If the zygote splits into two separate cells,

An embryonic cell that contains the potential to give rise to any tissue type is called a/an

Once the embryonic mass has 12 or more cells, it is called a

The placenta plays an important role in

An embryonic cell that has the potential to develop into a wide range of tissues is called a/an

When the embryonic mass of cells develops an internal cavity, the mass of cells is called a(n)

Germ layers form during the ____ period while organ systems mature during the ____ period.