Chitin is also found in the cell walls of certain fungi and algae. Biology chitin definition of by the free dictionarycollins english dictionary. It is a primary component of cell walls in fungi, the exoskeletons chitine, which was derived 1821 from greek word (chiton), meaning covering although you may have never heard it, chitin abundant nature.
Amyotrophic lateral sclerosis (ALS) is a progressive neurological disease that causes muscle weakness and gradually impacts on the functioning of the body, leading to eventual death. It is also referred to as motor neuron disease or Lou Gehrig's disease, named after the famous baseball player who had the condition.
There are several potential risk factors for ALS including: 1  Age. Although the disease can strike at any age, symptoms most commonly develop between the ages of 55 and 75. 2  Gender. Men are slightly more likely than women to develop ALS. 3  Race and ethnicity. Most likely to develop the disease are Caucasians and non-Hispanics.