Exam 28: Embryology and Human Development

Figure 28.2 Identify the labeled structure(s) in each of the following questions. -Identify the structures indicated by Label O.

Once cleavage starts, the zygote starts dividing, forming cells called ________.

Figure 28.4 Identify the labeled structure(s) in each of the following questions. -Identify the structure indicated by Label A.

The inner cavity of the blastocyst is called the ________.

Human sex cells are called ________.

The neural groove becomes the notochord.

Figure 28.1 Identify the labeled structure(s) in each of the following questions. -Identify the structure indicated by Label F.

At about day nine of development of the blastocyst, the cells of the inner cell mass are organized into an oval sheet that is two layers thick, called the ________.

Fusion of the male and female pronuclei forming the zygote is known as ________.

The embryonic development stage occurs during the ________.

Figure 28.1 Identify the labeled structure(s) in each of the following questions. -Identify the structure indicated by Label M.

Because of the great loss of spermatozoa during the process of traveling from the vagina to the ampulla of the uterine tube where fertilization occurs, a male must have at least ________ spermatozoa per milliliter, or he will be functionally sterile.

The ductus arteriosus provides an external short circuit between the pulmonary and systemic circuits.

Burrowing of the embryo into the endometrium is called ________.

The ________ is a hollow ball of cells.

From which germ layer are muscles derived?

Figure 28.1 Identify the labeled structure(s) in each of the following questions. -Identify the structure indicated by Label C.

The ________ is the site of early blood cell formation.

Figure 28.2 Identify the labeled structure(s) in each of the following questions. -Identify the structure indicated by Label D.

Figure 28.1 Identify the labeled structure(s) in each of the following questions. -Identify the structure indicated by Label E.