Chapter 9 and 13

what is the role of the sinoatrial node? What do we mean when we say it is self exciting?

Because it generates the heart rhythm. It stimulates itself

what is the role of the pulmonary circuit? what is the role of the systemic circuit?

The pulmonary circuit carries deoxygenated blood away from the heart to the lungs and returns oxygenated blood back to the heart. The Systemic circuit sends oxygen rich blood and nutrients to all body cells and removes wastes.

what is the role of Veins? What is the role of the Arties? What do each of them look like? What is the role of capillaries?

The role of veins is for the vessels to carry blood toward the heart. The arties carry blood away from the heart. An artery is thick walled and strong. veins are thin walls. Gases nutrients, and metabolic by products are exchanged through the capillary walls

blood moves from the left ventricle to which artery?

aorta

what type of tissue is the composed of?

cardiac Muscle tissue

During a heart attack where dose the blockage occur?

coronary Artery

what is the name of the arteries that supply blood directly from the heart?

coronary Artery

What are the different organs and vessels of the cardiovascular System?

heart, blood vessels, Arteries, capillaries and veins

ECG

is a recording of the electoral changes that occur in the myocardium a cardiac cycle

what is the name of the tissue that forms the sac around the heart?

pericardium