The left atrium receives oxygenated blood from the lungs, while the pulmonary artery carries deoxygenated blood from the right ventricle to the lungs; the sinoatrial (SA) node serves as the heart's primary pacemaker, generating electrical impulses that coordinate cardiac contraction; heart valves (mitral, tricuspid, pulmonary, aortic) prevent backflow and ensure unidirectional blood flow; venous valves in the lower limbs prevent gravitational pooling of blood; normal cardiac output ranges from 4-6 liters per minute, calculated as stroke volume multiplied by heart rate (60-100 bpm); the first heart sound (S1) is produced by closure of the mitral and tricuspid valves during ventricular contraction; coronary arteries supply oxygenated blood to the heart muscle; the vagus nerve (parasympathetic) slows heart rate by releasing acetylcholine, while the sympathetic nervous system increases heart rate during fight-or-flight responses.
Deep Dive
Prerequisite Knowledge
- No data available.
Where to go next
- No data available.
Deep Dive
RAPID MCQ SESSION PART- 9 | OSSSC Nursing officer | cardiovascular system | 5989 post | QRS Nursing.
Added:[music] session focus anatomy of phys First question. Which of the following chambers of the heart receives oxygenated blood?
Right sideber right vent.
Oxygenated bloody bloody left through body Left oxygenated bloody bloody deoxy infior.
Sorry, sorry.
Right.
Same cycle repeat.
circulation.
Which chamber of the heart receives oxygenated blood? The right answer to the left atrium. Option number C.
Next question. Which blood vessel carries deoxxygenated blood from the heart to the lungs? Question.
Blood vessel carries deoxxygenated from the heart to the lungs. Heart to lungs.
[snorts] Option pulmonary artery. Option C. Option superior.
Major blood vessels.
Human heart.
The first right [clears throat] infusionated bloodior Lower deoxxygenated blood right oxygen.
Pulmonary deoxygenated blood oxygenated blood right vent.
oxygen blood vess Pulmonary. [clears throat] Pulmonary fan.
body.
Out infior. Second pulmonary artery. Third, take blood away from heart. Away from heart.
Oxygenated.
Deoxinated bloody heart.
Heart or take blood towards Pulmonary artery deoxxygenated blood.
Pulmonary veented blood.
Deoxyenated blood oxygenated blood.
Which blood vessel carries deoxxygenated blood from heart?
Option number B. Right answer.
Next question.
Next question. What is the primary pacemaker of the primary pacemaker of the heart?
ventricular.t.
Electrical impulse.
for bundle of his bundle Right. Right.
Left ventricular muscle.
Conduction system.
Conduction system.
Electricity.
Conduction system bundle office Wonder bundle of bundle of RB bar right bundle bar how LB Left conduction system.
Next question.
Next question. What is the function of by cross speed? The next question.
Function of heartway.
One way.
One way.
Vlow prevent.
blood.
Press the Question. What is the function of speed?
Right. Right.
Right. Right.
Next pulmonary valve. Pulmonary valve.
Pulmonary.
Right.
Right.
Mal valve. Mital valve.
Left ventricle out.
Left ventricle out.
Next try out backflow.
Back ofts back flow of blood into left ventricle.
Prevents back flow of blood into right.
Regulates blood flow from right atrium to right ventricle. prevents back flow into the pulmonary vein.
Left blood right prevents backflow blood into left ventric sorry into left from left ventric left ventric left atrium backlo blood.
Right answer number diagram.
Next question. Which blood vessels have valves to prevent backflow?
>> [clears throat] >> Vans lower undulch.
for blood.
Foreign speech. Foreign speech. Foreign speech.
Hence unidirectional valve.
Vands have valves that prevent backflow of blood ensuring unidirectional flow unidirectional flow toward heart especially in the lower limbs where gravity can cause pulling of blood.
Next question.
Next question. What is the normal range of cardiac output in an adult?
Stroke volume.
Strobe volume into heart rate.
Heart rate 60 to 100 bits per minute.
Stroke volume into heart rate.
Next question.
Next question. Which heart sound is produced by closure of AV valves or ventricular valves?
S23 sound closure of valve right S2 Pulmonary S12 S3.
Next class det.
The first heart sound or S1 is produced by the closure of mital and triricospit ventricular valve during the beginning of ventricular system. Ventricular system for S1 right number A. Next question.
What is the main function of the coronary arteries?
oxygenated bloodonary coronary artery.
It carries oxygenated blood or oxygenated blood to the heart.
Base of the outer base of the outer coronary artery right Next right, right explanation. The coronary arteries arise from base of and supply oxygen rich blood to myioardium or heart muscle ensuring it.
Next question.
Which nerve is responsible for slowing the heart rate?
responsible. Option Arenic, option B vagus nerve, option C hyperosal nerve or option C sympathetic nerve right.
Sudden 10th cranial nerve explanation. The vean nerve is part of the parasympathetic nervous system and reduces heart rate by releasing acetyloline which decreases the firing rate of n.
sympathetic nervous system. Fight.
Fight and flight.
Parasympathetic.
Parasympathetic.
Rest.
Yeah.
[clears throat] Sympathetic parasympathetic nervous system.
Next system, anatomy of physi Santo, but
Related Videos
Why is IVF the treatment of choice?
aspirefertilityhouston
803 views•2026-06-14
The Lethal Cost of Disconnection: Loneliness, ADHD, and Life Expectancy | Dave Delaney TEDxFranklin
davedelaney
422 views•2026-06-15
ASMR Cranial Nerve Exam for Men Personal Attention Medical Roleplay for Sleep
gingerxasmr
999 views•2026-06-17
GLP 1s, Protein Shortages, and Apple’s Menopause Moment | Ep. 491
trimhealthymama
429 views•2026-06-18
Vaginal vs C-Section Recovery — What’s the Real Difference?
NutriAurabyAreej
935 views•2026-06-17
ECG interpretation made easy
Diseasedetective0
128 views•2026-06-14
21 Famous Actors Who Died From Alzheimer's Disease | Vintage Hollywood
BigstarV8
1K views•2026-06-19
How low carb creates insulin resistance
Nidhikumari_healthcoach
1K views•2026-06-16











