1. Unit 3: Chapter 11: Excretion
Removal of Metabolic Wastes

2. Removal and elimination of ___________________
A build up wastes would become ________ to the organism
Those _______ maybe be _________________________
A. __________________
material made from the substances that are utilized by
cells
a) ____________ – _______________
b) Mineral __________ – _______________________
c) _______ – __________________, synthesis reactions
d) ______________ – _____________________________
_______, Uric Acid, __________
e) _______ – _________________
*feces is not considered a metabolic waste because is has
never entered the cells

3. B. Human Excretory System
1. Lungs
- Lungs remove ______ and ______
- CO2 and H2O are the end products of ______________

4. 2. Skin
- keeps the body from drying out
- removes ___________ from the body
Sweat – __________________
_____________ – takes water and heat of the skin
“standing in front of the fan after gym”

5. 3. Urinary System
a) Kidneys
- bean shaped organs, “__________
___________”, 3 layers
- Remove _________________
- __________________
- ___________________ of
substances (___________)

6. * _______________ *
- _____________ piece of the kidney
- _________________ in each kidney
- Blood enters the __________ from the _________ artery
- ____________ – collection of _____________
- _______________________ of the blood into the _________
_________ - (collecting duct) pushed out under pressure
good and bad substances - water, glucose, amino acids,
salts, urea = filtrate – 180 L per day
- ___________ – filtrate passes into ___________ – reabsorb
______ by osmosis, reabsorb good substances (_______ and
__________) by active transport
- Left over fluid is ________ – some water, salts, and urea
 flows into the collecting duct

7. Nephron in Motion

8. b) ___________
- all the collecting ducts of the
nephrons forms the beginning
of the ureter
- tube that leads from the _____
to the _________
c) _____________
- ___________ until it is time to
go to the bathroom
d) ___________
- tube that carries urine _______
the body

10. 4. Role of the __________
a) ________________
- removes _________________ from the blood bacteria,
drugs, hormones
- returns less toxic materials to the blood to be excreted
from the body
b) ______________
- made of bile salts, _________ and broken down ______
- collected in the gall bladder and released into the
intestines
- helps __________ and absorb __________
- small intestine reabsorbs much of the bile salts
- ____________ – build up of broken down hemoglobin
 turn _______ – eyes, finger nails, skin

12. c) Formation of ____________
- ________________
- Urea is made from broken down amino acids
- amino group  ammonia  urea

13. C. Diseases of the Urinary System
- _________________ with harmful materials
- generally associated with alcohol
- liver becomes over grown and filled with scar tissue
- can not function properly – toxins build up in blood

14. b) __________________
- salts from the nephron filtrate ___________
- form stones that _________________________________
- use sound waves to break it up

15. c) ____________
- __________ form in the
blood and get stuck in the
joints
- from a build up of urea in
the blood  uremia
d) ______________
- used to _________________
- _________________________
– dialysis tubing