Lecture 4

Question 1

structures consisting of loose connective tissue covered by endothelium that are responsible for most septation processes occurring in the heart

Answer 1

endocardial cushions

Question 2

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Answer 2

EPICARDIUM

Question 3

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Answer 3

ENDOCARDIUM

Question 4

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Answer 4

MYOCARDIUM

Question 5

bending of the heart tube positions the heart in the left thoracic region and creates the “typical” heart shape with the atria posterior (to the back) to the ventricles

Answer 5

cardiac looping

Question 6

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Answer 6

BULBUS CORDIS

Question 7

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Answer 7

DEXTROCARDIA

Question 8

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Answer 8

SINUS VENOSUS

Question 9

first septum to grow down from the roof of the common atrium and contributes to the interatrial septum
prior to contact with the atrioventricular endocardial cushions, programmed cell death creates a new opening in this septum to maintain communication between the atrial chambers
this septum will form the valve of the foramen ovale

Answer 9

septum primum

Question 10

second septum to grow down from the roof of the common atrium toward the atrioventricular endocardial cushions
never makes contact with the cushions, such that an oblique opening (foramen ovale) is created between the _______ and septum primum that allows shunting of blood from the right atrium to the left during fetal development
at birth, this opening is closed when the septum primum is pressed against the _______ and the adult pattern of blood flow is established

Answer 10

septum secundum

Question 11

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Answer 11

OSTIUM PRIMUM

Question 12

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Answer 12

OSTIUM SECUNDUM

Question 13

opening in the interatrial septum that permits shunting of blopd from right to left during fetal development

Answer 13

foramen ovale

Question 14

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Answer 14

HEART-HAND SYNDROMES