Development of Heart

Question 1

Cardiogenic area - Derived from

Answer 1

Splanchnopleuric layer of lateral mesoderm.

Question 2

Location of Cardiogenic area

Answer 2

Cranial to oropharyngeal membrane

Question 3

Angioblastic cells gives rise to

Answer 3

Heart tubes

Question 4

Heart tubes are derived from

Answer 4

Angioblastic cells

Question 5

Single Heart tube is formed on

Answer 5

D19

Question 6

Parts of Heart tube

Answer 6

Bulbus cordis
Primitive Ventricle
Primitive atrium
Sinus venosus

Question 7

Bulbus cordis - Parts

Answer 7

Truncus arteriosus - Outflow tract of Aorta and Pulm. Trunk.
Conus - Spiral septum
Proximal 1/3rd - Rough part of RV

Question 8

Truncus arteriosus gives rise to

Answer 8

Outflow tract of Aorta and Pulm. Trunk.

Question 9

Proximal 1/3rd of Bulbus cordis gives rise to

Answer 9

Rough part of RV

Question 10

Rough part of RV derived from

Answer 10

Proximal 1/3rd of Bulbus cordis

Question 11

Primitive ventricle gives rise to

Answer 11

Rough part of LV

Question 12

Primitive atria gives rise to

Answer 12

Rough part of RA and LA

Question 13

Rough part of RA and LA derived from

Answer 13

Primitive atria

Question 14

Smooth part of RA derived from

Answer 14

Body and Rt horn of Sinus venosus.

Question 15

Smooth part of LA derived from

Answer 15

Absorption of Pul veins.

Question 16

Absorption of Pul veins gives rise to

Answer 16

Smooth part of LA

Question 17

3 veins of horn’s of Sinus venosus

Answer 17

Umbilical vein, Vitelline vein and Common cardiac vein.

Question 18

Coronary sinus is formed by

Answer 18

Lt horn of Sinus venosus

Question 19

What happens to Lt horn of sinus venosus.

Answer 19

Obliterates and forms coronary sinus.

Question 20

Conotruncal septum aka

Answer 20

Spiral septum or Aorticopulmonary septum

Question 21

Conotruncal septum is derived from

Answer 21

NCC

Question 22

Spiral septum - fxn

Answer 22

divides truncus arteriosus in a way that pul trunk goes into RV and aorta into LV.

Question 23

Anterior Displacement of Spiral septum causes

Answer 23

TOF

Question 24

TOF - Features

Answer 24

Pulmonary stenosis.
Overriding aorta.
RV hypertrophy.
VSD.

Question 25

TOF cause -

Answer 25

Antr displacement of Spiral septum.

Question 26

Non - Spiral Septum causes

Answer 26

TGV

Question 27

TGV causes

Answer 27

Non spiralling of septum.

Question 28

Persistent Truncus arteriosus causes

Answer 28

Failure of migration of NCC.

Question 29

EGG on string appearance is seen in

Answer 29

TGV

Question 30

Ostium primum is between

Answer 30

Septum primum and AV cushion

Question 31

Gap btw AV cushion and Septum primum is

Answer 31

Ostium primum.

Question 32

Gap btw Septum secundum and septum primum

Answer 32

Foramen ovale.

Question 33

What causes fusion of Septum primum and secundum

Answer 33

Inc in pressure of LV at time of birth

Question 34

Remnant of Septum primum

Answer 34

Fossa ovalis

Question 35

Remnant of Septum secundum

Answer 35

Limbus fossa ovalis.

Question 36

Parts of Interventricular septum

Answer 36

Muscular part
Membranous part
Outflow / Infundibular part.

Question 37

Muscular part of IVS derived from

Answer 37

Myocardium

Question 38

Membranous part of IVS derived from

Answer 38

ECC

Question 39

ECC gives rise to

Answer 39

Atrial septa and Ventricular septa
AV canals
AV valves
Aortic and pulmonary channels.

Question 40

Outflow /infundibular part of IVS derived from

Answer 40

NCC.

Question 41

NCC derivatives of CVS

Answer 41

Outflow or infundibular IVS and Conotruncal septum.