The blood from the right ventricle flows to the?

Two chemicals are influenced by the sympathetic system. Choose all that apply.

What does O represent on the diagram?  Wk. 5 Quiz Blank Label Heart ABCDE .pdf 

What does A represent on the diagram? Attachment – Wk. 5 Quiz Blank Label Heart ABCDE .pdf This picture can be used for all of the heart diagram questions. This quiz only uses this 1 picture so for all diagram questions refer to this picture. Alternate picture link

What does J represent on the diagram?  Wk. 5 Quiz Blank Label Heart ABCDE .pdf 

What does K represent on the diagram?  Wk. 5 Quiz Blank Label Heart ABCDE .pdf 

The _____ generates an electric impulse and sends it through the heart causing it to beat.

Heart relaxation

These are the pumping chambers of the heart.

The _____ is the muscle tissue of the heart, and forms a thick middle layer between the outer epicardium layer and the inner endocardium layer.