The total number of human olfactory receptor cells is about 40 million. The human eyeball is about 24.5 mm long. The octopus does not have a blind spot. The total weight of skin in an average adult human is 6 lb.(2.7 kg). There are 1,000 to 10,000 synapses for a typical neuron. The cell bodies of neurons vary in diameter from 4 microns (granule cell) to 100 microns (motor neuron in cord).
The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, a word that refers to a lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano; medically, it is the same as silicosis. Strengths is the longest word in the English language containing only one vowel. 2  Euouae, a medieval musical term, is the longest English word consisting only of vowels, and the word with the most consecutive vowels.
2 Contributions. I remember when people claimed that antidisestablishmentarianism  was the longest English word, so it may still be the longest one  beginning with the letter a.   Thâ¦e longest word in the English language which starts with the  letter 'A' is   antidisestablishmentarianism.