Embryology Review Flashcards

1
Q

2 weeks

A

Hgb Production

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2
Q

3 weeks

A

“Heart” Beat
Liver bud present
Mesentery is forming

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3
Q

3 to 4 weeks

A

Blood Cells Appear
Circulation is established
Primary neurulation

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4
Q

4 weeks

A

Intestine is present

Esophagus & stomach become distinct

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5
Q

4 to 5 weeks

A

Intraventricular Septum Begins to Form

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6
Q

5 weeks

A

Fusion of the endocardial Cushions

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7
Q

6 weeks

A

Midgut Into Umbilical Cord

Urinary Bladder Develops

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8
Q

6 to 7 weeks

A

Gonads Develop
Closure of Ventricular Septum
Formation of Coronary Arteries

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9
Q

7 weeks

A

Anal Canal Formed & Testosterone Released
Midgut Into Umbilical Cord
Urorectum Septum Fuses with Cloacal Membrane-separting rectum from developing urinary bladder

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10
Q

7 to 12 weeks

A

Maturation of Specific Immune Response

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11
Q

8 weeks

A

CV System Complete

& Nephrogenesis Begins

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12
Q

9 weeks

A

External Genitalia Form

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13
Q

10 weeks

A

Insulin Secretion Starts
Intestines reenter abdominal cavity and continue counterclockwise rotation around the axis of the superior mesenteric artery

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14
Q

9 to 10 weeks

A

Urine production & Glomerular Filtration

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15
Q

11 weeks

A

Thyroid Gland - TH synthesis

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16
Q

12 weeks

A

Able to see External Genitalia on Maternal Vaginal U/S Antigen recognition is demonstratable
Muscular layers of intestine are present
Active transport of amino acids begins
Pancreatic islet cells appear, bile appears

17
Q

12 to 13 weeks

A

Formation of the urethra complete

18
Q

13 weeks

A

Graft vs. Host reactivity is present

19
Q

14 to 15 weeks

A

Vascular pattern of kidney resembles that of the adult kidney

20
Q

16 weeks

A

Meconium is present

Swallowing is observed

21
Q

16 to 20 weeks

A

Chordee Occurs in the penis

22
Q

17 Weeks

A

Serum IgM levels can be detected

23
Q

24 weeks

A

Ganglion cells are detected in the rectum

24
Q

26 weeks

A

Random Peristalsis Begins

25
Q

34 to 36 weeks

A

Sucking & swallowing become coordinated

26
Q

36 to 38 weeks

A

Maturity of the GI system completed

27
Q

5 to 40 weeks

A

Intestine elongates approximately 100 fold

28
Q

35 weeks to years postnatal

A

Organization of neural function

29
Q

24 weeks to adult

A

Myelination of nerves

30
Q

24 weeks to term

A

Proencephalic Development