GA1. Development of Heart & Lungs

Question 1

The cardiac M. was developed from the ______ tissue

Answer 1

splanchnic mesoderm

Question 2

myoblast adhere to one another by special attachments that later develop into _______

Answer 2

intercalated disc

Question 3

The heart begins to develop before the end of the ____ week

Answer 3

third

Question 4

a pair of _____ fuse together to form the primitive heart tube

Answer 4

endocardial tubes

Question 5

Name the 5 regions that the heart develops into:

Answer 5

1. bulbous cordis
2. truncus arteriosus
3. sinous venosus (superior)
4. ventricles
5. atrium (superior)

Question 6

** The heart is developed in to ventral region beneath the _______

Answer 6

foregut

Question 7

Contraction of the primitive heart begins by day ___

Answer 7

22

Question 8

by the 7th week _______ & _____ forms

Answer 8

interatrial septum and interventricular septum

Question 9

Two structures that give rise to the pulmonary trunk & aorta

Answer 9

bulbous cordis & truncus arteriosus

Question 10

c.c.__________: consists of pulmonary stenosis, interventricular septal defect, right ventricular hypertrophy, and an overridding aorta

Answer 10

tetralogy of fallot

Question 11

c.c: _______ ass. with maternal rubella infection; remnant of the left sixth aortc arch

Answer 11

patent ductus arteriosus

Question 12

The lungs are derived from the ____gut

Answer 12

foregut

Question 13

The lungs start as _______ (lung bud)

Answer 13

respiratory diverticullum

Question 14

What is the endodermal linging of the tracheobronchial tree derived from ____?

Answer 14

foregut

Question 15

The respiratory diverticulum becomes invested by ___ as it elongates

Answer 15

splanchnic mesoderm

Question 16

______ perid of lung maturation is 6-16 weeks

Answer 16

psuedoglandular period

Question 17

_____ glands are formed during the psuedoglandular period

Answer 17

exocrine

Question 18

During the _____ period exocrine glands are formed

Answer 18

pseudoglandular period

Question 19

By the 16th week all major elements of the lung have formed except thoses involved in ______

Answer 19

gas exchange

Question 20

_______ period of lung maturation is btw the 16-26th week

Answer 20

canalicular period

Question 21

_______ period is when the lumina of bronchi and terminal bronchioloes becomes larger and lung tissue bc highly vascular

Answer 21

canalicular period

Question 22

During the canalicular period what structures become larger

Answer 22

lumina of bronchi and terminal bronchioles

Question 23

_____ period of lung maturation is 26 weeks to birth

Answer 23

terminal saccular period

Question 24

______ are primordial alveoli

Answer 24

terminal saccules

Question 25

Alveolar ducts give rise to _____

Answer 25

terminal saccules

terminal saccular period (26weeks to birth)

Question 26

What are terminal saccules lined by

Answer 26

type I alveolar cells and type II alveolar cells

Question 27

_____ period is when sufficient amount of surfactant is produced

Answer 27

terminal saccular period (26 weeks -birth)

Question 28

______ period of lung maturation is 32 weeks to 8 yrs

Answer 28

alveolar period

Question 29

During _____ period alveolarcapillary membrane becomes sufficiently thin to allow for gas exchange

Answer 29

Alveolar period

Question 30

cc______ : defect that enables blood to flow btw the R. and L. atruim

Answer 30

atrial septal defect

Question 31

cc____: defect where there is a problem in the intraventricle wall

Answer 31

ventricular septal defect

Question 32

cc____: defect where the aorta narrows where the ductus arteriosus inserts

Answer 32

coarticulation of the aorta

Question 33

cc. __: tetralogy of fallot defect where there is an obstruction to flow from the RV to the pulmonary art

Answer 33

pulmonary stenosis

Question 34

cc: _______ : (tetralogy of fallot) defect where the aorta is positioned over a ventricular spetal defect, instead of over the aorta

Answer 34

overridding aorta