5 Cardio

Question 1

Blood pumped per contraction

Answer 1

70 mL

Question 2

Fibrous skeleton of heart function

Answer 2

Anchors heart valves, prevents support to prevent from stretching

Gives attachment of myocardium of ventricles and atria

Question 3

Fibrous skeleton consists of

Answer 3

4 fibrous rings

2 fibrous triangle-structures connecting the rings

Membranous part of interventricular septum

Question 4

Day 18 primitive heart tube development

Answer 4

In epiblast: progenitor heart cells form

Via primitive streak-> go to cardiogenic area in mesoderm

Question 5

Day 20 development of primitive heart tube

Answer 5

Progenitor heart cells form 2 cardiogenic cords

These develop a lumen

Then form 2 endocardial tubes

Question 6

Day 21 development of primitive heart tube

Answer 6

By folding of embryo-> endocardial tubes migrate together

Fuse and form primitive heart tube on day 22