Role Of Other Organs In Excretion

Question 1

Other than kidneys, which organs participate?

Answer 1

Lungs
Liver
Skin

Question 2

What substances do the lungs remove?

Answer 2

Large amounts of CO2 (approximately 200ml/minute)

Significant quantities of water every day

Question 3

Largest gland
What substances does it secrete
How are these passed out

Answer 3

Liver

Bile containing substances like bilirubin, biliverdin, cholesterol, degraded steroid hormones, vitamins and drugs

Pass out along with digestive wastes

Question 4

Which other glands can eliminate certain substances through their secretions?

Answer 4

Sweat and sebaceous glands in the skin

Question 5

Nature of sweat

Answer 5

Watery fluid containing NaCl, small amounts of urea, lactic acid

Question 6

Primary function of sweat

Other functions

Answer 6

Facilitating a cooling effect on the body surface

Helps in removals of wastes including NaCl, small amounts of urea, lactic acid

Question 7

Sebaceous glands secretion

Answer 7

Sebaceous glands eliminate certain substances like sterols, hydrocarbons and waxes through sebum.
This secretion provides a protective oily covering for the skin.

Question 8

Does saliva help in elimination?

Answer 8

Small amounts of nitrogenous wastes could be eliminated through saliva too