Nutrition in animals

Fill in the blanks:
(a) The main steps of nutrition in humans are __________, __________,
__________, _________ and __________.
(b) The largest gland in the human body is __________.
(c) The stomach releases hydrochloric acid and ___________ juices which
act on food.
(d) The inner wall of the small intestine has many finger-like outgrowths
called _________.
(e) Amoeba digests its food in the ____________ .