Explain the reasons for the observed changes in blood flow velocity in the different regions of the circulation.

Video transcript

Hey, everyone. Let's take a look at this question together which of the following factors does not affect blood flow velocity. Is it answer choice? A resistance, answer choice B, cross sectional area, answer choice C blood vessel diameter or answer choice D oxygen levels of the blood. Let's work this problem out together to try to figure out which of the following factors does not affect blood flow velocity. So in order to solve this question, we can recall the factors that do affect blood flow velocity to determine which of the following factors does not. And we know some factors that do affect the blood flow velocity include resistance. Since resistance can lead to a slower blood flow as well as a cross sectional area. Since a cross sectional area can prevent the smooth flow of the blood and lastly blood vessel diameter, since a blood vessel with a narrower diameter can also lead to slower blood flow. So these are all ways that affect the velocity of the blood flow, whether it is in a negative or positive way. And since these are all factors that affect blood flow velocity, that means we can eliminate answer choice A answer choice B and answer choice C which leaves us with only one remaining answer choice which is answer choice D oxygen levels of the blood as the correct answer. Since the oxygen levels of the blood do not directly impact the velocity of the blood flow and primarily influence other things like the oxygen delivery to the tissues and organs. I hope you found this video to be helpful. Thank you and goodbye.