Which three systems are involved in the excretion of wastes in humans?

Excretion

SystemOrganExcretion

UrinaryKidneyNitrogen compounds Toxins Water Electrolytes

IntegumentorySkin-sweat glandsNitrogen compounds Water Electrolytes

RespiratoryLungCarbon dioxide Water

DigestiveIntestineDigestive wastes Bile pigments Salts of heavy metals

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

sorry if this did not , have a great day!