Embryo

Question 1

During the spermatogonial phase, spermatogonia are in the _______ with _______ cells.

Answer 1

seminiferous tubules

sertoli

Question 2

During the Spermatocyte Phase(meisosis), the spermatogonia divide into _______ by mitosis, which then undergo meiosis and form _______

Answer 2

spermatocytes

spermatids

Question 3

During the Spermatid phase, spermatids in the tubules develop into mature _______by spermiogenesis. The final maturation occurs in the _______ of the epididymis before sperm are stored in the _______epididymis.

Answer 3

spermatozoa
tail
distal

Question 4

Nuts and bolts of week 1 of embryonic development

Answer 4

Gametes fuse to become the zygote. The zygote becomes the blastula and implants at day 6

Question 5

Nuts and bolts of week 2 of embryonic development

Answer 5

Blastula completes implantation and the bilaminar disc is formed.

Question 6

Nuts and bolts of week 3 of embryonic development

Answer 6

gastrulation converts bilaminar layer into trilaminar layer

Question 7

Nuts and bolts of week 4 of embryonic development

Answer 7

Limb buds form and organogenesis begins

Question 8

Ameloblasts and the inner ear are derivatives of _______ectoderm

Answer 8

surface ectoderm

Question 9

The CNS(brain and spinal cord) are derived from

Answer 9

Neural Ectoderm

Question 10

Neurons of the PNS, the adrenal medulla, melanocytes, viscerocranium, and the head dermis is derived from

Answer 10

Neural Crest cells

Question 11

The inner ear bones are derived from _______ ectoderm while the middle ear bones are derived from _______

Answer 11

inner- surface

middle- Neural crest cells

Question 12

Ameloblasts are derived from _______ while odontoblasts are derived from _______

Answer 12

Ameloblasts- surface ectoderm

Odontoblasts- Neural Crest cells

Question 13

Important artery and cartilage derived from the first brachial arch

Answer 13

maxillary artery

incus carilage

Question 14

Important mandibular cartilage from first arch

Answer 14

meckels cartilage: malleus, maxilla, zygomatic, squamous temporal, and mandible

Question 15

Important nerves from first arch

Answer 15

maxillary V2 and Mandibular V3

Question 16

Important mm of first arch

Answer 16

mm of mastication, tensors, mylohyoid, anterior digastric

Question 17

Reicherts cartilage is derived from which arch

Answer 17

second

Question 18

the facial nerve and mm of facial expression are derived from which arch

Answer 18

second arch

Question 19

Which artery and which nerve are derived from the third arch

Answer 19

carotid artery and vagus nerve.

Question 20

The fourth arch derives which artery, muscle, and nerve

Answer 20

arch of the aorta
levator veli palatini, and
superior laryngeal of vagus nerve

Question 21

The recurrent laryngeal branch of the vagus nerve is derived from which branchial arch

Answer 21

sixth

Question 22

What is the external auditory meatus derived from

Answer 22

First pharyngeal cleft

Question 23

The auditory/eustatian tubes are derived from

Answer 23

the first pharyngeal pouch

Question 24

the palatine tonsils are derived from the

Answer 24

2nd pharyngeal pouch

Question 25

the thymus and inferior parathyroid glands are derived from

Answer 25

the third pharyngeal pouch

Question 26

Where are the superior and inferior parathyroid glands derived from?

Answer 26

superior 4th

inferior 3rd

Question 27

What layer are the salivary glands derived from?>

Answer 27

parotid= ecto
Submandib/ling= endo

Question 28

Name the aortic arch that is derived from each arch;
1st:
2nd:
3rd: 
4th:
Sixth:

Answer 28

1st: maxillary
2ns: none
3rd: carotid
4th: R subclavian and left aorta
6th: right pulmonary and left pulmonary artery/ductus arteriosus