All life is a staggering array of "in your face" mystery and complexity all the way down to their atomic and quantum levels. Humans, in particular, defy a materialistic evolutionary explanation.
 
By explanation, I mean accounting for the placement of each atom. Just saying this or that feature arises because of "survival value," "time," "mutations," need," "or "natural selection," is not the scientific detailed proof necessary for the following.
 
Cells
 
If the library of DNA within human cells was uncoiled and placed end to end it would be twice the diameter of the solar system.
 
Mitochondria, produce ATP (adenosine triphosphate), the energy currency of the body, at a rate of about 900000000000000000000 (9 X 10²⁰) per second. The total surface area of mitochondrial inner membranes where this takes place is almost four acres. We produce our body weight in ATP every day and could not survive more than fifteen seconds if the production shut down. During the course of the day, phosphates are attached and detached from the molecule to deliver this energy. Once ATP is formed, it's used up within a minute.

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If all cells from one human were placed side by side, they could encircle the Earth 200 times. There are almost 300 different kinds of cells known in the human body, about 100 trillion total. All human cells contain the same genetic information, yet somehow each one selects just that portion of the genetic information that dictates its specialized activity. A fat cell swells with fat, muscle cells contract, and immune cells destroy invading microbes.
 
This and every bit of cellular capability and complexity needs to be explained with reason and facts if evolution wants to take credit for it. 

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Sex
 
From a survival standpoint, it would have been far more efficient and survivable to stay simple asexual cells and divide into, or bud offspring. While microbes did and do just that, we supposedly evolved as two elaborate sexes simultaneously.
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A woman's egg only contains half her genes, and a man's spermatozoan only contains half his. That way, when the sperm combines with the egg, the resulting zygote (fertilized egg) has the correct diploid number of genes to grow a full human. No evolutionary mechanism can prove the spontaneous origin of somatic (body) cells that decide to divide into two like versions (mitosis) containing the full complement of genetic material, whereas other cells (eggs and sperm) decide to divide (meiosis) so only half the genetic material ends up in their progeny cells.

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Cardiovascular System
 
The heart beats 24 hours a day for a lifetime (almost 3 billion times by the age of 75). The tiny sinoatrial node in the heart contains about 10,000 pacemaker cells. These are the timer cells that discharge electricity to the heart muscle causing it to contract in a rhythm . . .  lub dub, lub dub. All 10,000 automatically discharge in synchrony. There is no feasible step-by-step origination of each cell in the heart and its pacemaker.

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The body contains 100,000 miles of blood vessels, enough to circle the Earth eight times, and nineteen billion capillaries. If the thinnest cross-section possible were sliced at any point along these miles, billions of chemical elements would be revealed in the cells sliced through. Each one of these slices must be accounted for along the entire hundred thousand miles—as well as how they are interlinked with the trillions of other slices and the trillions of other elements in the body. 

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Digestive System
 
Consider the coordination necessary for the tongue to dodge the teeth while we eat. Not only do we do it, we don't even think about it. Evolutionary buds of tongues would be chewed off, lacerated, macerated, infected, swallowed, and mutilated along the evolutionary path, making eating either too painful or impossible to do. Death would be the outcome for creatures attempting to evolve tongues. But since we are here with tongues, we must not have gotten here by such a process.
 
The anatomy and coordination necessary in the back of the throat to shunt food down the right tube are essential to life. If even once the food is swallowed down the wrong tube—the trachea instead of the esophagus— death could occur from asphyxiation or pneumonia from the food rotting in the bronchi and lungs. But we put food down the right tube millions of times over a lifetime without even thinking about it.
 
The stomach produces and secretes hydrochloric acid strong enough to dissolve a coin. This acid is responsible in large part for breaking down the protein foods, including tripe (stomach). As the stomach supposedly evolved, stomachs and bodies would have been self-digested as evolution worked out how the body could contain a chemical that was strong enough to dissolve the very tissues that produced it.
 
How every inch of the 30 feet of human intestine evolved all of its billions of components simultaneously is a mystery never explained with step-by-step detail. How our predecessors with partially evolved intestinal tracts could have survived the supposed millions of years of transitional and faulty stages is certainly a mystery as well.

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Auditory System
 
In response to some frequencies, the eardrum vibrates only one-tenth the diameter of a hydrogen atom. The membrane in the middle ear then vibrates only 300/1000-millionth of an inch in response. After recognition of the slightest sound, the ear returns to its ready state in about five-thousandths of a second. Sound is transmitted through three bones (malleus, incus, stapes) into fluid and to cilia that vibrate at 20,000 times per second. This causes atomic ions to move which in turn stimulates nerve transmission to the brain so the sound can be discerned. The ear can receive and separate the equivalent of notes from a piano with over 20,000 keys, as well as buffer any loud sounds. At the same time, the inner ear helps our sense of balance through the semicircular canals, equilibrates with atmospheric pressure through the Eustachian tube that connects to the back of the throat, and communicates in thousands of ways with the brain. That only begins the story of the complexity of hearing. Every minute step of formation must be explained mechanistically if evolution is to be believed.

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Olfactory System
 
The human nose can detect methyl mercaptan in rancid meat at a level of 1/400-billionth of a gram. It can also differentiate 4,000 other scents. This is made possible by about 150 million sensory cilia in the nose. They translate an odor into a specific neural transmission to the brain.
 
If that's not special enough, consider the smelling skills of our biological neighbors. The trace of sweat that seeps through shoes to the ground, and a few cells that drop off your skin to the ground as you move about through the day, is a million times more powerful than a bloodhound needs to track you down. An amorous silkworm moth can follow 1/10,000th of a milligram of a female's sexual attractant from seven miles away.
 
Central Nervous System
 
The brain contains 100 billion neurons, no two of which are alike. Evolution must account for each one of these. For the brain to function, the billions of neurons and trillions of interconnecting links transmitting signals through well over 60,000 miles of tendrils have to be wired correctly but yet permit hooking and rehooking of connections. It also makes no evolutionary sense that we presently have far more brain than we use and that it has the capacity for the artistic, musical, and mathematical genius not essential to survival.

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This brief review of complexity within the human body could go on and on through every single organ, tissue, and cell. A nose, section of skin, heart, liver, tooth, epiglottis, or knuckle present countless conundrums not solved by words like mutations and selection.
 
Evolution proposes a process of trial, error, and nascent development increment-by-increment. All precursors would, therefore, have inevitable errors and budding functionless detrimental features. That means all precursor creatures attempting to climb an evolutionary ladder would be culled (selected) out. In effect, evolution defeats itself.

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