Ch. 27 Vascular blood flow Dr. Daniel
For the average adult 1 cardiac cycle lasts how long?....
0.8 seconds
How many phases makeup 1 complete heartbeat? What is the first phase called?
2 phases first phase is called systole/ systolic pressure
For circulation of blood flow through systemic & pulmonary circuits takes how long? & on average about how many heartbeats?
23 seconds 27 heartbeats
What makes the "LUB" the first sound in the heart beat?
The AV valve closes creating the first sound of the heart beat lub. The Av valve closes to prevent blood form flowing back into he artium
What are the 3 major parts of the aorta ?
ascendig aorta, aortic arch & the descending aorta
Arteries carry blood ______ the heart
away from think A away
Veins carry blood ____ the heart
back to
What is a heart beat termed?
cardiac cycle
What does the lymphatic system do?
collects fluid form tissue soaces & transports it tot he blood vascular system
The endocardium thin part has smooth membranes that line the inside of the heart & forms the surface of the valves
endocardium
Since lymphatic system does not have a pumping system how does movements happen?
extrinsic pressure form surrounding organs & muscles
The muscular part of the heart
myocardium
What is 1 phase of contraction & dilation called?
pulse
What 2 things supplies blood to the myocardium? & they arise on the aortic sinus superior to the aortic valve
right & left coronary arteries
This is a tissue in the wall of the right atrium it sends out an electrical signal to start the contraction / the pumping of the heart muscle The pace maker sets the rate of teh heart beat. These electrical impulses makes what beat first? The impulses then travek down to teh AV node
sinus pace maker of the heart The atria beat first
what determines the varies of heart rate?
size, weight & gender
These people tend to have faster heart rates?
smaller, young individuals & female
What are the 2 communicating sets in the lymphatic systems ?
superficial & deep systems
Atria & ventricles contract is called the ....... phase & then relax & dilate your diastole in receiving blood
systole
Where does the aorta descend to?
the left side of the vertebral coloumn to level of L4 &descending aorta) where it divides itnot he right & left common iliac arteries
What causes the 2nd noise the DUB sound of the heart beat?
the valves closing
What happens during the systolic pressure/ systole phase/ 1st phase?
the ventricles contrast & pump blood into the aorta & pulmonary arterie
How mcuh thicker is the left side of the heart then the rest?
3X because it has to be stronger ti be able to push all of the blood through the aorta through the body
