piles (Science: medicine) The small, troublesome tumours or swellings about the anus and lower part of the rectum which are technically called haemorrhoids. Origin: The singular pile is sometimes used. Blind piles, haemorrhoids which do not bleed. Origin: L. Pila a ball. Cf. Pill a medicine...
Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..
This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..
This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..
