Heart Structure

Question 1

What are the two main purposes of the heart?

Answer 1

1)pump for blood
2)connects with vessles to distribute blood in body

Question 2

Where does the heart sit?

Answer 2

between two plural cavities in the mediastinum

Question 3

what are the four main layers of cardiac tissue?

Answer 3

Pericardium
epicardium
myocardium
endocardium

Question 4

Pericardium

Answer 4

-the covering for the heart
-sac-like structure that surrunds, lubricates, and protetcs the heart and root of blood vessles

Question 5

The pericardium has two layers. What are they and which layer are they?

Answer 5

1.Parietal pericardium: outer layer
2.Visceral Pericardium: inner layer

Question 6

Epicardium

Answer 6

outer layer of cardiac tissue responsible for making pericardial fluid

Question 7

Myocardium

-which layer is it?
4 points

Answer 7

-middle layer
1.primary muscle tissue of heart
2.contain myocytes (short, branched, single-nucleus cells)
3.myocytes utilize gap junctions to propohate electric signals for cardiac contraction
4.Myocytes are involuntary and automatically controled

Question 8

Endocardium
Which layer is it?
3 main points

Answer 8

inner layer
1.made of epitheal cells to create a smooth lining inside chambers of heart
2.creates an ionic barrier between heart and cardiac tissue
3.Helps with FRICTION!!