Down syndrome is named after John Langdon in 1866.
Down's syndrome is a genetic disorder.
Down syndrome is a condition that has an extra chromosome.
Down syndrome is caused by trisomy 21 in that the person has three copies of chromosome 21.
Down syndrome and speech :
Individuals who suffer from down syndrome often have difficulty producing a few speech sounds.
Children with down syndrome have delayed speech, language, and communication skills.
They have anatomical and physiological differences in their area of mouth than those of normal people.
The anatomical and physiological features include a small upper jaw, high arched palate, and low muscle tone in the tongue along with weak oral muscles.