Summary
Summary A Level Biology OCR A - The Structure and Function of the Mammalian Kidney (15.5)
notes on the structure and function of the kidney that helped me achieve an A* in biology
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Seller
Follow
Content preview
🐢15.5 The Structure and
Function of the Mammalian
Kidney
Class Bio
Created @Apr 29, 2021 12:31 PM
Date of Exam @May 10, 2021
Exam Questions done?
Reviewed
Teacher Mrs Batchelor
Type Sub-topic
Human kidneys are a pair of reddish-brown organs attached to
the back of the abdominal cavity. They are usually surrounded
by a thick, protective layer of fat and a layer of fibrous
connective tissue.
The kidneys play two important homeostatic roles in the body -
they are involved in excretion and osmoregulation. They filter
nitrogenous waste products out of the blood, especially urea.
15.5 The Structure and Function of the Mammalian Kidney 1
, They also help to maintain the water balance and pH of the
blood, and hence the tissue fluid that surrounds all the
cells.
the anatomy of the kidneys
The kidneys are supplied with blood at arterial pressure by
the renal arteries that branch off from the abdominal aorta.
Blood that has circulated through the kidneys is removed by
the renal vein that drains into the inferior vena cava. About
90-120cm3 of blood passes through the kidneys every minute.
All of the blood in the body passes through the kidneys about
once an hour. The kidneys filter 180dm3 of blood a day,
producing 1-2dm3 of urine. The final volume depends on many
different factors.
The kidneys are made up of millions of small structures called
nephrons that act as filtering units. The sterile liquid
produced by the kidney tubules is called urine. The urine
passes out of the kidneys down tubes called ureters. It is
collected in the bladder, a muscular sac that can store around
400-600cm3 of urine. When the bladder is getting full, the
15.5 The Structure and Function of the Mammalian Kidney 2
The benefits of buying summaries with Stuvia:
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
You can quickly pay through credit card for the summaries. There is no membership needed.
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 these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller amystill1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £3.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
48298 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 15 years now