answered graded A+ 2025/2026
1 in __ dogs have some form of heart disease by age ___ - correct answer ✔✔3; 10
cardiovascular disease usually has ________ symptoms prior to becoming severtr - correct
answer ✔✔few
The main function of the cardiovascular system - correct answer ✔✔distribute blood
throughout the body
blood from the __________ system is oxygenated - correct answer ✔✔pulmonary
oxygenated blood is brought to vital organs via _________ circulation - correct answer
✔✔systemic
One of the main problems with cardiovascular disease is that blood flow is no longer ________ -
correct answer ✔✔unidirectional
4 functional components of each circulatory system division - correct answer ✔✔-pump
-distribution system
-exchange region
-collection system
the heart is the _______ source of the cardiovascular system - correct answer ✔✔energy
,2 separate pumps in the heart - correct answer ✔✔atrium and ventricles
the right side of the heart provides... - correct answer ✔✔circulation into the pulmonary system
the left side of the heart provides... - correct answer ✔✔blood flow into the systemic circulation
atria - correct answer ✔✔upper side of each compartment
ventricle - correct answer ✔✔receives blood from atria, projects it outward
heart is mechanically and electrically ___________ - correct answer ✔✔interdependent
pumping energy or "heart beats" are... - correct answer ✔✔rhythmic contractions initiated by
specialized myocardial cells
heart valves open and close based on __________________ - correct answer ✔✔pressure
gradients
Diastole - correct answer ✔✔ventricular relaxation
Aortic> ventricular pressure
-ventricular filling
-aortic valve closed, mitral valve open
Systole - correct answer ✔✔ventricular activation
Aortic< ventricular pressure
-both valves closed, systolic contraction increases pressure, aortic valve opens
,Mitral valve - correct answer ✔✔-mitral valve opens in one direction
-valve between left atrium and left ventricle
Tricuspid Valve - correct answer ✔✔valve between right atrium and ventricle
aortic valve - correct answer ✔✔opens to aorta
What do heart valves maintain? - correct answer ✔✔unidirectional flow
The blood is red in the diagrams because it is oxygenated, that is the... - correct answer
✔✔pulmonary circulation, left side of heart
blood is blue in the diagrams because it has been ______________ and it is going to pass
through the _______________. This is the ______ side of the heart - correct answer
✔✔deoxygenated; pulmonary system; right
What occurs when flow through the heart valves is abnormal? - correct answer ✔✔heart
murmurs
Cardiac value = - correct answer ✔✔stroke volume X heart rate
When pressure increases in the ventricle, there is a _____________ in volume - correct answer
✔✔decrease
(before it leaves, known as end-diastolic volume, after it leaves, known as end-systolic volume)
arterial pressure - correct answer ✔✔the blood volume from the heart is transferred into the
arterial system
, diastolic pressure - correct answer ✔✔lowest value of arterial pressure
systolic pressure - correct answer ✔✔highest value of arterial pressure
Arterial circulation - correct answer ✔✔-pressure storage
-greatest resistance outflow
-pressure w/in arterial system is a function of volume in minus volume out at any moment
Basic features of the vascular system or distribution system - correct answer ✔✔-blood
transports metabolic substrates to tissues and metabolic waste products away from tissues
-arteries and arterioles regulate flow to select vascular beds
Mean Arterial Pressure - correct answer ✔✔CO x TPR
(cardiac output X total peripheral resistance)
Arteries surrounded by thick layer of ________ muscle - correct answer ✔✔smooth
Total peripheral resistance (TPR) - correct answer ✔✔overall resistance of arterial vasculature to
allow volume in to leave to next component of vascular system (capillaries)
Changes in resistance occur via mechanisms _________ or _________ to vascular smooth
muscle - correct answer ✔✔intrinsic or extrensic
MAP is __________ regulated - correct answer ✔✔tightly
If CO or TPR decreases, MAP... - correct answer ✔✔drops (vasodilation)