In the human body there are about two hundred and sixty-three bones. The muscles are about five hundred in number. The length of the alimentary canal is about thirty-two feet. The amount of blood in an adult averages 30 pounds, or fully one-fifth of the entire weight.
The heart is six inches in length and four inches in diameter and beats seventy times a minute, 4200 an hour, 100,800 a day, 36,792,000 a year, 2,565,440,000 in three-score and ten years, and at each beat two and a half ounces of blood are thrown out of it, one hundred and seventy-five ounces a minute, six hundred and fifty-six pounds an hour, seven and three-fourths tons a day. All the blood in the body passes through the heart in three minutes. This little organ by its ceaseless industry, pumps each day what is equal to lifting one hundred and twenty-two tons one foot high, or one ton one hundred and twenty-two feet high.
The lungs will contain about one gallon of air at their usual degree of inflation. We breathe on an average 1200 times an hour, inhale six hundred gallons of air, or 24,000 a day. The aggregate surface of the air cells of the lungs exceeds 20,000 square inches, an area very nearly equal to the floor of a room twelve feet square.
The average weight of the brain of an adult male is three pounds and eight ounces, of a female two pounds and four ounces. The nerves are all connected with it, directly or by the spinal marrow. These nerves, together with their branches and minute ramifications, probably exceed 10,000,000 in number, forming a bodyguard out-numbering by far the greatest army ever marshaled!
The skin is composed of three layers, and varies from one-fourth to one-eighth of an inch in thickness. The atmospheric pressure being about fourteen pounds to the square inch, a person of medium size is subjected to a pressure of 40,000 lbs. Each square inch of skin contains 35,000 sweating tubes or perspiratory pores, each of which may be likened to a little drain pipe one-fourth of an inch long, making an aggregate length of the entire surface of the body of 201,166 feet, or a tile ditch for draining the body almost forty miles long.
Man is marvelously made. Who is eager to investigate the curious and wonderful works of Omnipotent Wisdom, let him not wander the wide world around to seek them, but examine himself.—Selected.
Two or three young men who were once visiting Washington went into the National Museum. On one of the cabinets was a label with these words: "The body of a man, weighing one hundred and fifty-four pounds." "Where is the man?" asked one of the young men. No one answered him. In the cabinet were two jars of water and other jars in which were phosphate of lime, carbonate of lime, potassium, sodium, and other chemicals. Another section held a row of clear glass jars filled with gasses—hydrogen, oxygen, and nitrogen. The materials in those cabinets were given in exact proportion as combined in an ordinary man. After looking at the assortment for some time in silence, one of the young men said: "And that is what I am made of? That is all that goes to make me?"
"That is all," said a bystander as he smiled and walked on.
But the young man did not smile. "If that is all that is needed," said one, "so much lime, so much gas, so much water, we should be exactly alike. There is something more which they cannot put into cabinets."
"Yes," said another under his breath, "that which is added by God, who puts into these senseless elements that which makes a living soul." They passed on in silence, their souls and their God suddenly becoming real before those cabinets filled with all the material essentials for the making of a man.—The Youth's Companion.