Excretion in Humans Flashcards
1
Q
What are some substances that are removed in excretion
A
- Carbon dioxide
- Urea
- Excess water that is not needed by the body.
2
Q
What is urea
A
Urea is a waste substance made in the liver due to excess proteins
3
Q
What does the kidney do in the excetory system
A
The kidney filters the blood and removes excess water and urea
4
Q
How is urine made
A
Urine is made when the urea dissovles in the excess water in the kidney
5
Q
What carries the urine from the kidney to the bladder
A
The ureter
6
Q
Urine flows out of the bladder through a tube known as the
A
Urethra
