lec 8 part 3

Question 1

Septum Primum shape

Answer 1

sickle shaped crest

Question 2

Septum Primum descend from

Answer 2

the roof of the atrium

Question 3

Septum Primum dividing

Answer 3

the atrium in two but leaves an opening

Question 4

Ostium Primum

Answer 4

opening leaved by Septum Primum

Question 5

Osteum primum is obliterated by

Answer 5

fusion of the septum primum with the Endocardial Cushion

Question 6

Ostium Secondum is formed in

Answer 6

the upper portion of Septum Primum,

Question 7

Ostium Secondum is formed before

Answer 7

closure of Osteum primum

Question 8

Ostium Secondum is formed by

Answer 8

cellular death in that septum

Question 9

Septum Secondum shape

Answer 9

crescentic

Question 10

Septum Secondum develops

Answer 10

superiorly and descends downwards

Question 11

Septum Secondum اهميتو

Answer 11

begins to overlap the ostium secondum

Question 12

Foramen Ovale.

Answer 12

The opening left by the septum secondum

Question 13

At birth

Answer 13

↑ P in Lt. atrium → septum secondum and the septum primum) بلزقو ببعض و بعدين
close the communication between the two
atria.