Pages in this set

Page 1

Preview of page 1
Homeostasis 24/04/20
06

Homeostasis means "controlling internal conditions":
Waste products that need to be removed + how

CO2 Produced by respiration, removed via lungs

Urea Produced by liver breaking down amino acids,
removed by kidneys and transferred to bladder


Internal conditions that need controlling + how

Temperature Increased by shivering,…

Page 2

Preview of page 2
Formation of Urea
24/04/20
06




· Urea is a soluble waste
product made by the liver.
· Excess amino acids are
converted to urea.
· Raised levels of urea are
toxic.

Page 3

Preview of page 3
24/04/20
06

Page 4

Preview of page 4
Kidneys 24/04/20
06


Kidneys are responsible for controlling ion, urea and
water content.

Blood in



Kidneys are made up of two
important tissues ­ BLOOD
VESSELS and TUBULES.


Blood out

Ureter (tube that takes
urine down to bladder)

Page 5

Preview of page 5
24/04/20
06

Page 6

Preview of page 6
Kidney function
24/04/20
06


A poisonous waste called _________ is made in the liver
from broken down _______ _______. The _________
remove urea from the blood. The kidneys also control the
amount of ________ and salts (_____) in the body. The
substances removed from the blood by the kidney is…

Page 7

Preview of page 7
Kidney structure
24/04/20
06

Page 8

Preview of page 8
24/04/20
06
The Bowman's Capsule and Glomerelus.

Page 9

Preview of page 9
24/04/20
06

Page 10

Preview of page 10
Kidneys 24/04/20
06


Kidneys work in 3 stages:
Blood vessel Tubule
1. ULTRAFILTRATION - Lots of water and
products of digestion are squeezed out of
the blood and into tubules under pressure.

2. SELECTIVE REABSORPTION ­ the blood
takes back the things it wants (e.g. glucose,
ions and water) even…

Comments

No comments have yet been made

Similar Science resources:

See all Science resources »