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  3. a. in the lub-dub sound of a heartbeat, the lub is

a. In the lub-dub sound of a heartbeat, the lub is louder. Why is this? b. The...

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Medical Sciences

a. In the lub-dub sound of a heartbeat, the lub is louder. Whyis this?

b. The descending aorta has three paired arteries and threeunpaired arteries that flows away from with oxygenated blood tosupply organs in the abdominal/thigh area. The inferior vena cavahas three paired veins BUT NOT three unpaired veins flowing into itwith deoxygenated blood. Where do the unpaired veins take blood tofrom the abdominal region and why?

Answer & Explanation Solved by verified expert
4.1 Ratings (488 Votes)
a the lubb sound is due to the closure of Av valves When SA node produce impulse the conduction through the atria is fast and it contracts soon after it the atria remain to relaxed state    See Answer
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