100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Human biology lecture notes R50,00
Add to cart

Class notes

Human biology lecture notes

 1 view  0 purchase

Human biology lecture notes about the organization of the urinary system.

Preview 4 out of 34  pages

  • November 4, 2022
  • 34
  • 2021/2022
  • Class notes
  • Haines-arries
  • All classes
All documents for this subject (20)
avatar-seller
anlifourie
Lecture 11

Organization of the
Urinary System

B Curr II HUB228 2022
Dept. Medical Biosciences
University of the Western Cape

, Functions of the Urinary System
principle organs = kidneys; accessory organs = ureters, urinary
bladder, urethra (“conducting system”)
1.Excretion
– filters blood & forms urine to remove:
a) organic waste products generated by cells
b) foreign substances e.g. drugs, pesticides and ingested chemicals
2.Regulation of:
– blood volume & pressure by producing large volumes of diluted urine or
small volumes of concentrated urine
– concentration of solutes in the blood, e.g. Na+, Cl-, K+, Ca2+, HCO3- and
HPO4-2
– pH of the extracellular fluid by secreting H+ or HCO3- into nephron
3.Hormonal function
– synthesis of blood cells by secreting erythropoietin
– synthesis of vitamin D (calcitriol), which plays NB role in controlling
blood levels of Ca2+
– synthesis of the enzyme renin

, Location of the Kidneys
• kidneys lie on either side of the
vertebral column, between T12
and L3 (vertebrae)
• superior poles of both kidneys
extend above level of 12th rib &
lower edge of thoracic parietal
pleura – to avoid a possible
pneumothorax from occurring
during a renal biopsy, tissue is
removed from lower poles
• the right kidney is usually a
little lower than the left,
presumably because the liver
takes up some of the space
above the right kidney
• the left kidney is often slightly
larger than the right

, External Anatomy of the Kidneys
• located between the parietal
peritoneum and the muscles of
the dorsal body wall, in a
retroperitoneal position
• 3 layers of supportive tissue
surrounds the kidneys
1. Renal capsule
- connective tissue layer that
surrounds each kidney
2. Perirenal fat
- surrounds renal capsule & act as
shock absorber to protect kidneys
from mechanical shock
3. Renal fascia
- thin connective tissue layer that
surrounds and anchors kidneys
& fat to abdominal wall

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying this summary from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller anlifourie. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy this summary for R50,00. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

56326 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy summaries for 14 years now

Start selling
R50,00
  • (0)
Add to cart
Added