Ch 31: structure and function of the cardiovascular and lymphatic systems

in the normal cardiac cycle which of the following occurs?

- 2 atria contract together while the 2 ventricles relax - 2 ventricles contract together while 2 atria relax

conduction of the heart

1. SA node 2. AV node 3. Bundle of His (RBB, LBB) 4.Purkinje fibers

cardiac cycle

A complete heartbeat consisting of contraction and relaxation of both atria and both ventricles

Which does not affect HR? a. SNS nerves b. PSN nerves c. AV valves d. ACh

Av valves.

pulmonary circuit

Carries blood to and from gas exchange surfaces of lungs

which is the correct sequence of the pulmonary circuit?

Right Ventricle Pulmonary arteries Lungs Pulmonary veins Left atrium

the normal heartbeat is initiated by the

SA node

four valves of the heart

Tricuspid, bicuspid (mitral), pulmonary, aortic Tricuspid- Right side, 3 cusps Bicuspid/Mitral- Left side, 2 cusps

vena cava

a large vein carrying deoxygenated blood into the heart

blood vessels order

arteries, arterioles, capillaries, venules, veins

the pulmonary artery

artery carrying oxygen-poor blood from the heart TO THE LUNGS

cardiac cycle stages

atrial systole, isovolumetric ventricular contraction, ejection, isovolumetric ventricular relaxation, passive ventricular filling.

veins

carry deoxygenated blood to the heart

arteries

carry oxygenated blood away from the heart

systemic circulation

circulation that supplies blood to all the body except to the lungs

isovolumetric ventricular contraction

early phase of systole when atrioventricular and aortic valves are closed and ventricular size remains constant

the layers of the heart

epicardium, myocardium, endocardium **enclosed to the pericardium**

cardiac output

heart rate x stroke volume

The pulmonary veins carry blood to the

left atrium of the heart

oxygenated blood flows through

pulmonary veins

the chambers of the heart

right atrium, right ventricle, left atrium, left ventricle

the pulmonary circuit is also known as the

right side of the heart

systemic circulation also known as

the left side of the heart

circulatory system

the organs and tissues involved in circulating blood and lymph through the body

structure of blood vessels

tunica intima, tunica media, tunica externa (adventitia)