Question

what is an enamel
what is egestion

Answer 1

Answer:

1. Enamel is the thin outer covering of the tooth. This tough shell is the hardest tissue in the human body. Enamel covers the crown which is the part of the tooth that's visible outside of the gums.
2. Egestion is the act or process of voiding or discharging undigested food as faeces. To egest means to discharge undigested material or food.

Answer 2

Enamel: It is the hard protective covering on each tooth of oral cavity which protects it from tooth decay. It is the hardest inorganic substance in the human body (even harder than bones).

Egestion: It is a process through which unicellular organisms (like, Amoeba) get rid of unwanted waste in their body.