By Inc. Encyclopaedia Britannica
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Additional info for Britannica Illustrated Science Library Human Body II
1 NOTORIOUS FAMILIES 200 PAPILLOMAVIRUSES produce warts and are associated with cervical cancer. 5 Assembly New capsids, tail bodies, and fibers are joined to create new bacteriophages. Once they are formed, the new viruses must wait for the break down of the bacterial wall in order to be released and attack other bacteria. NEW VIRUS With the tail body joined to the capsid virus makes copies of itself by using the DNA molecule injected into the bacterium. Although the bacterium displays a normal external appearance, there are more than 100 copies of the virus being replicated inside.
The language region of the brain also deteriorates. People who suffer from Alzheimer's tend to have trouble carrying out and expressing complex reasoning. Language disorders include lack of initiative in speaking and slowness to respond to the listener. Parkinson's Disease Parkinson's disease is a degenerative disease that attacks one in 200 persons, mostly over 60 years of age. This neurological disorder, which affects more men than women, progressively deteriorates the EXPRESSIONS Persons affected by Parkinson's disease tend to suffer from rigidity in their facial expressions.
In multiple sclerosis, the immune system macrophages remove sections of myelin and leave the nerve fiber uncovered, which causes nerve impulses to travel slowly or not at all. NERVE FIBER 64 MOST COMMON DISEASES ATLAS VISUAL DE LA CIENCIA CUERPO HUMANO II 65 Bone Degeneration Rheumatoid Arthritis In this autoimmune disease, the immune system, triggered by some antigen in a predisposed person, begins to ecause joints are made to function in very specific ways, any abnormal movement tends to cause injury.