Posted: April 19th, 2017
Module 07 Lab Worksheet: Urinary System
The pre-lab evaluation questions must be answered prior to lab and demonstrated to your lab instructor. You must read through the assigned chapter readings, lab introduction, objectives, overview and procedure to answer these questions.
Please cite your work for any reference source you utilize in answering these questions.
1.Describe the blood flow to the kidney and within including the renal artery and vein, interlobar arteries, cortical radiate arteries and afferent arteries?
The renal arteries branch off of the abdominal aorta and supply the kidneys
with blood. The arterial supply of the kidneys is variable from person to
person, and there may be one or more renal arteries supplying each kidney.
Due to the position of the aorta, the inferior vena cava, and the kidneys in the
body, the right renal artery is normally longer than the left renal artery. The
renal arteries carry a large portion of the total blood flow to the kidneys, up
to a third of the total cardiac output can pass through the renal arteries to be
filtered by the kidneys. Renal blood supply starts with the branching of the
aorta into the renal arteries (which are each named based on the region of
the kidney they pass through) and ends with the exiting of the renal veins to
join the inferior vena cava. The renal arteries split into several segmental
arteries upon entering the kidneys. Each segmental artery splits further into
several interlobar arteries and enters the renal columns, which supply the
and medulla to form the arcuate arteries. The arcuate “bow shaped” arteries
as the name suggests, radiate out from the arcuate arteries. The cortical
2.In your own words, describe the anatomy and function of the components that make up the renal corpuscle.
A renal corpuscle is composed of a tangle of small blood vessels, called a
glomerulus, which filters your blood, and the Bowman’s capsule, which
collects the filtered molecules and directs them into the tubing of your
3.In general and in your own words, briefly describe the role of the three regions to the renal tubule section of a nephron.
The three regions to the renal tube are divided by the proximal tube, the loop
of Henle, and the duct via medulla. The proximal tube is mostly present in the
cortex and performs the part of reabsorption of nutrients and minerals from
tubular fluid and then transports these absorbed components to blood
located in peritubular capillaries.
The loop of Henle goes down dipper in the medulla and assists the
establishment of medullary interstitial fluid’s environment. Then the loop of
Henle comes back as distal convoluted tubule to juxtaglomerular apparatus
of corpuscle, a place from where it originated. Lastly, the collecting duct via
medulla goes back to pour into pelvis and nephron unit’s end point.
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