Head & Neck Anatomy | Embryology & Pharyngeal Arches

Question 1

Egg Week 1: Occurs when sperm and egg unite in the fallopian tube.

Answer 1

Fertilization

Question 2

Egg Week 1: Refers to an initial diploid cell

Answer 2

Zygote

Question 3

Egg Week 1: Refers to a ball of cells that is the result of cleavage.

Answer 3

Morula

Question 4

Egg Week 1: Refers to the ball of cells once it develops a cavity called a blastocoel

Answer 4

Blastula

Question 5

Egg Week 1: Occurs when the blastula contacts the uterine wall.

Answer 5

Implantation

Question 6

Egg Week 1: Refers to the inner cell mass that will form the embryo proper.

Answer 6

Embryoblast

Question 7

Egg Week 1: Refers to the outer cell mass that will form the placenta.

Answer 7

Trophoblast

Question 8

Egg Week 2: Inner cell mass becomes a bilaminar disk that consists of an _________ and ____________.

Answer 8

Epiblast and hypoblast

Question 9

Egg Week 2: Wich sac and cavity form?

Answer 9

Primary yolk sac and amniotic cavity

Question 10

Egg Week 2: which side does the amniotic cavity form, the hypoblast or epiblast side?

Answer 10

Epliblast side

Question 11

Embryonic Week 3: What’s the process where a single sheet of cell transitions into 3 dinstinction germ layers?

Answer 11

Gastrulation

Question 12

Embryonic Week 3: What are the 3 Germ layers that form from gastrulation?

Answer 12

Ectoderm, Mesoderm, Endoderm

Question 13

Embryonic Week 3: Which germ layer forms the epidermis, nervous system, facial skeleton, and teeth?

Answer 13

Ectoderm

Question 14

Embryonic Week 3: Which germ layer forms the body skeleton, all muscles, and connective tissue?

Answer 14

Mesoderm

Question 15

Embryonic Week 3: Which germ layer forms the lining of hollow organ systems?

Answer 15

Endoderm

Question 16

What are the arrows pointing to on the ectoderm side?

Answer 16

Primitive Streak

Question 17

The primitive streak form on the _________ side of the embryo, on the __________ surface?

Answer 17

Caudal side of the Dorsal Surface.

Question 18

The primitive streak indicates the beginning of what process?

Answer 18

Gastrulation, the formation of three germ layers.

Question 19

Which area of which germ layer produces only the enamel of the teeth?

Answer 19

The surface layer of the ectoderm.

Question 20

Which part of the embryo is responsible for forming everything except the enamel in teeth?

Answer 20

Neural Crest

Question 21

Neurulation takes place during which week of development?

Answer 21

Week 4

Question 22

Gastrulation occurs during which week of development?

Answer 22

Week 3

Question 23

What happens during neurulation?

Answer 23

Process where the flat neural plate rolls into a neural tube like a yoga mat.