Humans Excrete And Defecate 2.0

Excretion

Organs

Lungs

Kidney

Skin

Waste Materials

1. Urine

    a. Excreted by kidneys.

    b. Contains urea, mineral salts and water.
2. Sweat

    a. Excreted by sweat glands.

    b. Contains urea, mineral salts and water.
3. Water vapour

    a. Excreted by lungs.

    b. In exhale air.
4. Carbon dioxide

    a. Excreted by lungs.

    b. In exhale air.

Defecation

1. Removal of undigested food in form of faeces.
2. Faeces formed in the large intestines.
3. Removed through anus.