Explain why :
(a) Skin functions as an accessory excretory organ.
Abnormal constituents of urine are :
1. Proteinuria : e.g. When albumin and globulin are present in urine.
2. Glycosuria : When glucose is present in urea.
3. Hematuria : It is the presence of blood in urine is called hematuria.
4. Ketouria : The presence of ketone bodies causes ketouria.
5. Albuminuria : Presence of albumin in urine is callcd albuminureu.