OB BOLD 3 Flashcards by Thomas Moore

Q

skeletal system forms from the

A

mesoderm

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Q

skeletogenesis is

A

formation of the skeleton

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Q

orgogenesis

A

placement of mesoderm and development into cartilage and bone

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Q

osteoclasts do what

A

crush bone

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Q

what happens in ossification centers

A

cartilage degenerates and bone replaces it

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Q

primary ossifications centers are where

A

more central (diaphysis)

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Q

secondary ossification centres are wher

A

more peripheral (epiphysis)

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Q

when do ossification centres develop

A

postnatally

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Q

what is between epi and diaphysis

A

metaphysis

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Q

what does the metaphysis contain

A

growth plate

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Q

limb buds seen what week on TV

A

7

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Q

clavicle and mandible develop what week

A

8

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Q

primary ossification centers seen what week

A

11-12

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Q

hand and feet visualizeed what week

A

12-14

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Q

fetal movement seen by what week

A

9-10

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Q

foot should be ____ to the tib/fib

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A

perpendicular

Q

femur to foot ratio

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A

1

Q

cardio-thoracic ratio

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A

<0.5

Q

thoracic - abdo circ ratio

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A

> 0.8 after 20 weeos

Q

abdominal components form from the

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A

endodermal and mesodermal tissue

Q

mesoderm forms

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A

kidney and spleen

Q

yolk sack stay connected to primitive gut by

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A

vitelline duct

Q

omphalocele is

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A

when bowel and organs protrude through the umbilical defect –> skin intact

Q

gastroschisis

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A

when bowel loops are outside the abdo wall (no skin covering)

total situs inversus

stoamch and heart on the right

partial situs inversus

stomach on left, heart on right (dextrocardia)

non-visualized stomach =

esophageal atresia

bowel is ____ to liver

isoechoic

doppler flow in the umbilical vein should be

HEPATOPEDAL

point of enterance of cord into abdo

abdominal cord insertion