Histology MCQs/Development of Cardiovascular System

Heart beats early. Its action can be recognised using Doppler ultrasound imaging.

1 In which vessel of the fetal circulation takes place pure arterial blood?

	Umbilical vein before connection with portal circulation
	Truncus pulmonalis
	Descendent aota
	Pulmonal veins

2 Majority of blood ejected to the truncus pulmonalis in fetal circulation continues into:

	Pulmonary circulation
	Ductus arteriosus
	Ascendent aorta
	Left atrium

3 Mesoblastic period of hematopoiesis is period of production of blood inside:

	Intraembryonic mesoderm
	Mesoderm of yolk sack
	Liver and spleen
	Bone marrow

4 What is an angiogenesis?

	Formation of new vessels independent on other vessels
	Sprouting of new vessels from older vessels
	Maturation of the vascular wall
	Maturation of the arterial wall

5 What is a vaskulogenesis?

	Formation of new vessels independent on other vessels
	Sprouting of new vessels from older vessels
	Maturation of the vascular wall
	Maturation of the venous wall

6 When are formed blood islands?

	In the 2nd week
	In the 3rd week
	In the 5th week
	In the 4th week

7 When the embryonic heart starts to beat?

	Around 16th day
	Around 21th day
	Around 28th day
	Around 35th day

8 Where starts development of the heart? (Where is the cardiogenic area)?

	In cranial part of trilaminar germ disk
	In middle part of trilaminar germ disk
	In caudal part of trilaminar germ disk
	In anterior wall of the yolk sack

9 Which statement about the fetal circulation is true?

	Blood which is rich on oxygen and nutrients flows though the umbilical vein
	In the cranial part of inferior caval vein flows mixed blood
	Ductus arteriosus connects aorta with truncus pulmonalis
	Ductus venosus is later stage of venous sinus

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