Achromotrichia
(Science: clinical sign) absence or loss of pigment in the hair.
Dictionary > Achromotrichia
You will also like...
Origins of Life on Earth
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Birth Control and Contraception
Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..
Movement of Molecules Across Cell Membranes
Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..
ATP & ADP – Biological Energy
ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..
The Human Nervous System
The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..
Sensory Systems
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..