Question

accordingly, what is the average velocity of blood in cm/s in the aorta and the capillaries when the cardiac output is 90 ml/s?

Answer #1

The velocity of the blood in the aorta is about 0.5 m s-1 , and
the velocity of the blood in a capillary is about 0.001 m s-1 . We
have only one aorta, with a diameter of 20 mm, but many capillaries
in parallel, each with a diameter of 8 ?m. Estimate how many
capillaries are typically open at any one time. Assume now that the
diameter of the aorta has decreased by 15%. What needs to happen so...

The approximate inside diameter of the aorta is 0.53 cm; that of
a capillary is 11 μm. The approximate average blood flow
speed is 1.0 m/s in the aorta and 1.0 cm/s in the capillaries. If
all the blood in the aorta eventually flows through the
capillaries, estimate the number of capillaries in the circulatory
system.

The heart
pumps blood into the aorta at a rate of 4 L/min. Calculate the
average speed of blood if the aorta’s diameter is 2 cm.
The aorta branches many times until the blood finally reaches
the smallest branch: the capillaries. Each capillary has an average
diameter of 6 μm and a length of 1 mm, and the blood slows down to
0.5 mm/s. Calculate the number of capillaries in the body.

What is the force that allows blood to flow from the aorta to
the capillaries and back to the vena cava (right atrium)?
a.The valves in the heart.
b.The contraction of the atria.
c.The position of the body.
d.Gravity.
e.The pressure gradient from left to right.

Oxygen-rich blood bound for the body tissues leaves the heart
through the aorta, the major blood vessel emerging from the heart.
It branches out to the arteries, which in turn branch into smaller
vessels called arterioles (little arteries). These then branch into
tiny, thin-walled capillaries. Blood travels slowly as the red
blood cells squeeze through tiny capillaries. The radius of the
aorta is approximately 9.8 mm and the speed of the blood there is
30 cm/s. A typical capillary has...

The radius of the aorta is about 1.0 cm , and the blood passing
through it has a speed of about 40 cm/s
Calculate the average speed of blood flow in the major arteries
of the body, which have a total cross-sectional area of about 2.2
cm2 .

The
large blood vessel leading from the human heart, the aorta, has an
inside diameter of 1.0 cm and a length of 40 cm. The flowing blood
(SG = 1.06) has a viscosity of 3.5 CP and an average velocity of 60
cm/s. Find the pressure drop across the aorta, if it is (a)
horizontal, (b) vertical with upward flow, and (c) vertical with
downward flow.

The cross-sectional area of a certain person's aorta (the major
blood vessel emerging from the heart) is 3.0 cm2, and
the speed of the blood through it is 35 cm/s. A typical capillary
has a cross-sectional area of 2.7 x 10-7 cm2
and a flow speed of 0.058 cm/s. How many capillaries does the
person have?

How does the blood pressure, blood velocity, and total
cross-sectional area relate to the arteries, capillaries, and
veins? How does this affect capillary function?

Assume that blood at a density of 1.06 g/cm3 is
flowing through the ascending aorta (diameter 2.5cm) at a
time-averaged velocity of 50cm/s. The mean arterial pressure at
this location is 100mmHg. If blood were to flow through a 7cm
abdominal aortic aneurysm:
a) Calculate the pressure in the aneurysm if the subject is in
supine position; show all unit conversion.
b) assuming the maximum diameter of the aneurysm is located 50cm
below the ascending aorta, calculate the pressure in...

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