Cvs

Question 1

Distal 1/3 of bulbus cordis ( truncus arteriosus) gives rise to?

Answer 1

Ascending aorta and pulmonary trunk

Question 2

Middle 1/3 of bulbus cordis( conus)

Answer 2

Forms outflow tracts of rt and lt ventricles

Question 3

Proximal 1/3 of bulbus cordis

Answer 3

Forms the rt ventricle (trabeculated part)

Question 4

Primitive ventricle forms

Answer 4

Primitive left ventricle( trabeculated part )

Question 5

Primitive atria forms

Answer 5

Trabeculated rt and lt atrium

Question 6

Left horn of sinus venosus

Answer 6

Coronary sinus

Question 7

Right horn of sinus venosus

Answer 7

Smooth part of rt. atrium

Question 8

Rt common cardinal vein and rt. Ant. Cardinal vein

Answer 8

Superior vena cava

Question 9

Left common cardinal vein

Answer 9

Oblique vein of atrium

Question 10

Rt supracardinal vein, rt subcardinal vein and rt posterior cardinal vein.

Answer 10

Inferior vena cava

Question 11

Rt supra cardinal vein

Answer 11

Azygous vein

Question 12

Left supra-cardinal vein

Answer 12

Hemiazygous vein

Question 13

No of aortic arches and their direction of growth.

Answer 13

6 pairs of aortic arches & develop in cephalocaudal direction

Question 14

Purpose of aortic arches

Answer 14

Interconnect ventral aortic roots to dorsal aorta

Question 15

What happens to 1st aortic arch?

Answer 15

Mainly disappears, remaining forms inferior alveolar artey ( a br. Of maxillary artery)

Question 16

2nd aortic arch fate

Answer 16

Mainly disappears, remaining forms the stapedial art.

Question 17

3rd aortic arch fate

Answer 17

Common carotid and proximal internal carotid art.

Question 18

4th aortic arch fate( rt )

Answer 18

Proximal rt subclavian artery and brachiocephalic art.

Question 19

4th aortic arch fate( lt)

Answer 19

Arch of aorta

Question 20

5th aortic arch

Answer 20

Completely disappears. DOES NOT develop in human embryo.

Question 21

6th aortic arch fate

Answer 21

Rt & lt. Pulmonary arteries and ductus arteriosus( on left side only )

Question 22

Ductus arteriosus postnatal derivative

Answer 22

Ligamentum arteriosum

Question 23

Ductus venosus postnatal derivative

Answer 23

Ligamentm venosum

Question 24

Left umbilical vein

Answer 24

Ligamentum teresof liver( contained in falciaprum ligament)

Question 25

Rt umbilical vein

Answer 25

Disappears

Question 26

Vitello intestinal duct

Answer 26

Meckels diverticulum

Question 27

Urachus( part of allantoic duct b/n bladder and umbilicus)

Answer 27

Median umbilical ligament

Question 28

Obliterated umbilical artery

Answer 28

Medial umbilical fold

Question 29

Lateral umbilicalfold( epigastric fold)

Answer 29

Inferior epigastric artery

Question 30

Proximal part of umbilical art.

Answer 30

Superior vesical A.

Question 31

Distal part of umbilical artery

Answer 31

Lateral umbilical ligament

Question 32

Patent urachus complications, symptoms & treatment.

Answer 32

Patent urachus forms a urachal fistula between the umbilicus and dome of urinary bladder. Sym: may present with watery discharge from umbilicus( urine stained ) on straining. Trt: surgical excision Comp: adeno ca / TB may occur

Question 33

Left subclavian is formed from

Answer 33

Left 7th cervical intersegmental artery.

Question 34

Portal vein is formed by

Answer 34

Rt and lt vitelline veins and anastomoses between them.

Question 35

Major cardiac septa is formed between

Answer 35

5-7 weeks of development

Question 36

Fossa ovalis remnant of

Answer 36

Septum primum

Question 37

Opening between upper and lower limbs of septum secundum.

Answer 37

Foramen ovale

Question 38

Interatrial septum is formed by

Answer 38

Fusion of septum primum with secundum

Question 39

Double aortic arch results when

Answer 39

Rt dorsal aorta also persists distal to origin of the rt. 7th cervical intersegmental artery.