ANATOMY of HEART I

Question 1

Between what ribs does the heart lie?

Answer 1

In-between rib 2-5

Question 2

Where does the APEX lie?

Answer 2

• 5th intercostal space in the midclavicular line
• in space between 5th and 6th costal rib

Question 3

What is the pericardium?

Answer 3

Layer that covers the heart

Question 4

in what 2 layers does the pericardium subdivide?

Answer 4

• Fibrous pericardium
• inner serous pericardium

Question 5

How is is the serous pericardium structured?

Answer 5

• Parietal pericardium: lines inner surface of the fibrous pericardium
• Visceral pericardium: lines the to the surface of the heart
• Pericardial cavity : space in-between parietal pericardium and visceral pericardium, contains pericardial fluid which prevents FRICTION

Question 6

How is the heart wall structured?

Answer 6

• Endocardium; inner layer of the heart wall, endothelium
• Myocardium: middle layer of the heart wall, CARDIAC muscles
• Epicardium : outer layer which is essentially visceral pericardium

Question 7

what are pectinate muscles?

Answer 7

Muscles found in the atria of the heart