Aloe vera is a cactus-like plant. It is stemless with triangular,
fleshy leaves ranging in colour from grey-green to bright
green and the margins of the leaves have small white ‘teeth’.
The leaves are composed of three layers: an inner gel, a yellow
sap and the outer thick layer of 15-20 cells known as rind
(Surjushe et al., 2008; Hashemabadit and Kaviani, 2010).