Steps involved in Nutrition in animals :-
(i) Ingestion : Taking in food, chewing and swallowing.
(ii) Digestion : Conversion of complex food into simple absorbable form.
(iii) Absorption : Absorbing digested food.
(iv) Assimilation : Utilisation of digested food by body tissues.
(v) Egestion : Removal of undigested food out of the body.