| Question | Answer |
| Describe capillaries. | Join arterial system with venous system.
Most significant.
Provide cells with vital products.
Remove waste products from cells. |
| Describe Heart. | Hollow muscular organ lying in the mediastinum that propels blood to entire body. |
| Describe the SA node. | Located in upper portion of the right atrium.
Has built-in rhythm.
Initiates and transmits each heart beat.
Sets basic pace for cardiac rate. |
| How do veins return blood to the heart? | Skeletal muscle contraction.
Gravity.
Respiratory activity.
Valves. |
| How is blood supplied to the heart muscle? | coronary arteries. |
| Name the factors that influence blood pressure | Resistance of blood flow.
Pumping action of heart.
Viscosity of blood.
Elasticity of arteries.
Quantity of blood. |
| Name the four structures responsible for electrical conduction of the heart. | SA node.
AV node.
Bundle of His.
Purkinje fibers. |
| Name the 3 layers of the heart. | Endocardium.
Myocardium.
Epicardium. |
| What are the 3 layers of artery walls? | tunica externa.
tunica media.
tunica intima. |
| What are the 3 major types of blood vessels? | Arteries.
Capillaries.
Veins. |
| What are valves? | Small structures within veins that prevent backflow of blood. |
| What is endocarditis? | Inflammation of the inner lining of the heart and its valves. |
| what type of blood do arteries carry? | oxygenated blood. |
| What type of blood do veins carry? | deoxygenated blood. |
| Where is each heart valve located? | Tricuspid - right ventricle and right atrium.
Pulmonic - pulmonary arteries and right ventricle.
Bicuspid/mitral - left atrium and left ventricle.
Aortic - aorta and left ventricle. |
