Myocardium

Question 1

What heart muscle underlies the pericardium?

Answer 1

Myocardium

Question 2

What does the myocardium make up?

Answer 2

Majority of the bulk of the heart

Question 3

Myocardium is type of muscle only found where?

Answer 3

In cardiac tissue

Question 4

What is myocardium specialised in?

Answer 4

Structure & function

Question 5

How many categories can myocardium be divided into? What are these?

Answer 5

2 categories
Majority specialised in mechanical work (contraction)
Remainder specialised for initiating & conducting electrical impulses

Question 6

How are cardiac muscle cells held together?

Answer 6

Bundles of fibres
Arranged in spiral or circular way

Question 7

Cardiac muscle fibres

Answer 7

Shorter than skeletal muscle fibres
Have branches

Question 8

What are the ends of cardiac cells attached to?

Answer 8

Adjacent cells

Question 9

What do desmosomes do?

Answer 9

Hold cells together

Question 10

What do gap junctions do?

Answer 10

Allow passage of electrical current