Excretory system Flashcards
What does the excretory system do
Release of materials, which arise in the body due to metabolism
What main organs are responsible for excretion in birds
- kidneys - secrete uric acid
- salt glands (water birds)
- lungs - water loss
Do birds have sweat glands
NO
What does the urinary system include
- kidneys
- ureters
- cloaca
What is nitrogenous waste production
A prominent part of homeostasis is accomplishes then the removal of metabolic waste such as
- CO2
- NH3 (ammonia)
- H20
What is deamination and what does it lead to
Removal of an amine group - nitrogenous part
- leads to the production of ammonia
What is nitrogenous waste converted to
Uric acid
What’s the main role software kidneys
- remove nitrogenous waste
- adjust ion ( salt levels) concentration
- Adjust water content
How many lobes does a kidney have
3
What are kidney tubules or nephrons for
The basic functional unit of kidneys
What are the 2 types of nephrons in bird
Reptilian nephron
Mammalian nephron
What happens when only the waste remains, what waste remains
Excess water, salts and uric acids
They move to the utter
Ureters go into the cloaca
Then its mixed with indigestible materials from digestive system
When waste reaches cloaca there is often backward flow into colon
IN colon reabsorption of excess water and salta take place
Why is excreting good for birds
Helps keep their weight down
