two layered serous membrane, outermost layer of the heart, has serous fluid between layers
pericardium
innermost layer of heart, composed of thin layer of connective tissue, lines interior of heart
endocardium
forms bulk of the heart wall and is the thickest and strongest layer of the heart, composed of cardiac muscle tissue
myocardium
dividing part of the heart, seperates the right and left sides
septum
upper right chamber of heart, receives deoxygenated blood from body, sends blood to right ventricle
right atrium
lower right chamber of heart, recieves deoxygenated blood from right atrium, sends blood to pulmonary artery for gas exchange in the lungs
right ventricle
upper left chamber of heart, recieves oxygenated blood from lungs via pulmonary veins, sends blood to left ventricle
left atrium
lower left chamber of heart, recieves oxygenated blood from left atrium, thickest and most muscular section of heart, pumps blood out aorta to body
left ventricle
valves located between atrium and ventricles,
atrioventricular (AV) valves
right AV valve, contains three flaps/cusps
tricuspid valve
left AV valve, composed of two cusps (bicuspid)
mitral valve
small cordlike stuctures, connects the AV valves to the wall of the heart, works with papillary muscles to make a tight seal to prevent backflow when the ventricles contract
chordae tendineae
valves located where blood exits the ventricles, have three cusps
semilunar valves
valves located between right ventricle and pulmonary artery
pulmonary semilunar valve
valve located between left ventricle and aorta
aortic semilunar valve
initiates heart beat, located in upper right atrium, regulates heart beat, aka pacemaker
sinoatrial (SA) node
Put the impulse pattern in the correct order:
D. SA node
A. AV node
C. bundle of His
B. right and left bundle branches
D. Purkinje fibers
Contraction phase of heartbeat
systole
relaxation phase of heartbeat, allows blood to enter the relaxed chambers
diastole
first sound of heartbeat, produced by AV valves closing
lubb
second sound of heart beat, produced by semilnar vlaves closing
dubb
tiny blood vessels joining arterioles and venules, gas exchange occurs here
capillaries
blood vessels carrying blood away from heart, contain oxygenated blood
arteries
blood vessels that carries blood toward heart, carrying deoxygenated blood
veins
blood vessels connecting arteries and cappilaries
artierioles
blood vessels connecting veins and cappilaries
venules
Put the blood flow in the correct order:
B. artery
A. arteriole
E. capillary
C. venule
B. vein
delivery of oxygen and nutrient rich arterial blood to cardiac muscle tissue and return of oxygen-poor blood to the venous system
coronary circulation
largest artery of the body, composed of four parts, what is it and list the parts
Aorta
ascending aorta
arch
thoracic portion of descending aorta
abdominal portion of descending aorta
largest vein of the body, two seperate parts that return blood to the right atrium from body
vena cava (has superior and inferior vena cavas)
air sacs that is surrounded by capillaries and exchanges gas with the blood, giving it oxygen
