Embryonic Period Flashcards

1
Q

Period of “organogenesis” - development of?

A

Period of “organogenesis” - development of
ORGANS

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2
Q

Embryonic period Occurs from___ to __ weeks of pregnancy

A

3rd to 8th

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3
Q

T or F
by the end of the embryonic period the main organs are established, rendering the features of the external body

A

TRUE

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4
Q

What day?
your neural tube will have the neural plate, and the depression at the center is the neural groove

A

By the 19th day

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5
Q

What day?
There is a formation of neural folds, that will continue to rise until they fuse

A

Day 22

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6
Q

What day?
the heart begins to beat, ___week of development.

A

the heart begins to beat, 4th week of development.
Day 24-28

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7
Q

T or F
The venous system is ready to supply nutrients and oxygen by the 50th day only

A

FALSE
The venous system is ready to supply nutrients
and oxygen by day 24-28

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8
Q

The cranial neuropore will close at Day ?

A

The cranial neuropore will close at Day 25

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9
Q

The caudal neuropore closes by Day ?

A

The caudal neuropore closes by Day 28

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10
Q

Process whereby neural plate is transformed to neural tube

A

Neurulation

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11
Q

T or F
At the 2nd week, the lateral edges form a neural
fold that gradually fuse at the midline to form the
neural tube

A

FALSE
At the 3rd week, the lateral edges form a neural
fold that gradually fuse at the midline to form the
neural tube

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12
Q

T or F
Fusion begins cranially and caudally - shoulder to legs
Neural Tube forms as a result

A

FALSE
Fusion begins cranially and caudally - head to
legs
Neural Tube forms as a result

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13
Q

Structures formed from ectodermal layer

A

CNS
➢ PNS
➢ Epidermis
➢ Enamel of teeth
➢ Mammary Glands
➢ Pituitary Glands

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14
Q

During the ___day, your cells will proliferate your
midline forming your paraxial mesoderm

A

During the 17th day, your cells will proliferate your
midline forming your paraxial mesoderm

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14
Q

The mesoderm layer remains thin laterally forming the ___Plate
In your paraxial, we have your head and somites

A

Mesoderm layer remains thin laterally forming the
Lateral Plate
In your paraxial, we have your head and somites

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15
Q

T or F
Paraxial Mesoderm forms somitomeres to somites which will give
rise to the

A

TRUE

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16
Q

muscle tissue supplied by one nerve

17
Q

cartilage and bone supplied by one nerve

A

Sclerotome

18
Q

dermis of the skin supplied by one nerve

19
Q

Forms excretory units of the urinary system and
the gonads develop from this segment

A

Intermediate Mesoderm

20
Q

Forms the kidney and gonads, testes and ovaries

A

Intermediate Mesoderm

21
Q

two layers of the lateral mesoderm, what is inner what is outer?

A

Parietal Layer - outer layer
Visceral Layer - inner layer

22
Q

What forms the git tube

A

Visceral Layer - inner layer

23
Q

Forms dermis of skin body wall and limbs, the bones, and connective tissue of limbs
▪ Forms the lateral body wall folds
▪ Forms the parietal layer of serous membrane

A

Parietal Layer - outer layer

24
Space between the parietal and visceral layer of the lateral plate mesoderm
Body Cavity
25
- divides it into thoracic and peritoneal cavities for your thorax and abdominal organs
Diaphragm
26
divides into pericardial cavity and two pleural cavities
Thoracic Cavity
27
Structures formed from Mesodermal Layer
Vascular System - heart, arteries, veins Urogenital System - kidneys, gonads, and their ducts Spleen Suprarenal Glands
28
Three Regions of the GUT tube
- foregut, midgut, hindgut
29
Structures formed in the Endoderm
GIT - main organ formed o Epithelial lining of the GIT, Respiratory tract, and Urinary Bladder o Epithelial lining of tympanic cavity and auditory tube o Parenchyma - thyroid, parathyroid, liver, pancreas
30
Neural tube defect (NTD) due to failed closure of cranial region Brian failed to form properly They have learning difficulties
Anencephaly
31
Neural Tube Defect (NTD) due to failed closure of caudal region The most common site is the lumbosacral region
Spina Bifida
32
An abnormality of migration of neural crest cells into the pharyngeal arches can lead to improper development of the parathyroid glands, thymus, facial skeleton, heart, aorta, and pulmonary trunk
DiGeorge Syndrome or Catch22 Syndrome
33
They are more likely to suffer from - Hypocalcemia, Cleft Palate, Tetralogy of Fallot, Recurrent Infection, Renal Problems, and Learning Problems
DiGeorge Syndrome or Catch22 Syndrome
34
Tetralogy of Fallot - you have a 4 defect, the ventricular septal defect, pulmonary stenosis, misplaced aorta, and right ventricular hypertrophy. It is a domino effect
DiGeorge Syndrome or Catch22 Syndrome
35
Occurs when body wall closure fails in the abdominal region
. Gastroschisis
36
Intestinal loops hemiate into the amniotic cavity through the defect which usually lies to the right of umbilicus
. Gastroschisis
36
37
Peritoneal and pleural cavities are continuous along the posterior body wall o This hernia allows abdominal visceral to enter pleural cavity, usually on left
Congenital Diaphragmatic Hernia
38
Upper portion of the stomach are retained in the thorax and the stomach is considered at the level of diaphragm
Esophageal Hernia
39