Histology and Embryology

Question 1

Where does the heart originate?

Answer 1

In the visceral mesoderm above the neural tube

Question 2

What kind of folding forms the pericardial cavity?

Answer 2

Lateral folding

Question 3

How does the heart tube descend into the pericardial cavity?

Answer 3

Embryo undergoes cranio-caudal folding

Question 4

Blood flow through early heart tube?

Answer 4

In through sinus venosus and out through aortic roots

Question 5

Which day does the heart fold to form normal shape?

Answer 5

23

Question 6

Order of heart tube segments from bottom to top?

Answer 6

Sinus venosus, primitive atria and ventricle, bulbus cordis and trunctus arteriosus

Question 7

The sinus venosus becomes the?

Answer 7

Smooth right atrium + coronary sinus

Question 8

The primitive atria and ventricles become the?

Answer 8

Trabeculated atria + ventricles

Question 9

The bulbis cordis becomes the?

Answer 9

Trabeculated right ventricle + outflow of ventricles

Question 10

The trunctus arteriosus becomes the?

Answer 10

Aorta + pulmonary trunk

Question 11

Aortic pair 3 becomes the?

Answer 11

Common carotid + ICA

Question 12

Aortic pair 4 becomes the?

Answer 12

Right subclavian + aortic arch

Question 13

Aortic pair 6 becomes the?

Answer 13

Pulmonary branches + ductus arteriosus + vagus nerve

Question 14

What drains the yolk sac?

Answer 14

Vitelline vein

Question 15

What drains the lower limbs?

Answer 15

Cardinal veins

Question 16

What drains the placenta?

Answer 16

Umbilical vein

Question 17

What drains the gut and liver?

Answer 17

Hepatic portal system

Question 18

What originally divides the atria?

Answer 18

Septum primum

Question 19

Septum primum forms the?

Answer 19

Foramen secundum

Question 20

What grows on the right of the septum primum?

Answer 20

Septum secundum

Question 21

What does the septum secundum form?

Answer 21

The foramen ovale

Question 22

Small, pale and few glycogen?

Answer 22

Pacemaker

Question 23

Dark, full of glycogen and inercalated discs?

Answer 23

Contractile muscle cells

Question 24

Area of the endocardium that contains the Purkinje fibres?

Answer 24

Subendothelium

Question 25

Myocardium contains what 2 things?

Answer 25

Contractile cells and capillaries

Question 26

Adipose tissue on the epicardium houses the?

Answer 26

Coronary arteries

Question 27

Pericardium is a outer … layer and and inner layer of …?

Answer 27

Fibroelastic and simple squamous epithelium

Question 28

Layer of the heart valves that are continuous withe the cytoskeleton and attach tot eh chordae tendinae?

Answer 28

Lamino fibrosis