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.
English dictionary entries claiming the title of longest English word: The longest word in a standard English dictionary is the 45-letter 'pneumonoultramicroscopicsilicovolcanoconiosis' . This word was concocted in 1935 by a fan of word games and puzzles, using the lung disease, silicosis, as its base.t is an obscure term referring to a lung disease caused by inhalation of silica dust. However, it is actually 4 words. The longest non-technical word in an English dictionary, (and the longest in common usage) is the 34-letter 'supercalifragilisticexpialadocious' .