Here’s one for the Evolutionists to ponder on! Thanks Lee! -anita
I’ve often thought about trained scientists and medical personnel who have so much wondrous and awe-inspiring knowledge about their respective disciplines and the human body. In fact, in some ways I’m even a little jealous of what all they know. Yet many of those people still manage to reach a conclusion that says the wonders that they see regularly all occur as a result of chance and evolution.
I was reminded of this again recently when I read a story authored by Dr. Randy Guliuzza of the Institute for Creation Research detailing the incredible functionality of our own body as each person’s body works day after day doing something as mundane as maintaining our body temperature. I had never thought about it before, but our body works very hard, constantly, to keep our body temperature within 2° F of approximately 98.6° F. According to this article, our body works best in a temperature range of 96° to 101°, all controlled by the body’s temperature regulator, the hypothalamus. How important is this regulation of temperature? Small children go into seizures at a temperature of 106° and most people die if temperature gets near 109°. Conversely, if our body core chills below 87° we go into cardiac arrest.
In the article I read, the amount of body heat our body generates is massive. “…about 60% of [our] daily energy needs—[that’s] enough heat to raise the temperature of 20 lbs. of water about 2° every hour—is expended just staying alive.” Apparently, some engineers assert that, if an office building is optimized for thermal efficiency, that building could be heated through the winter “…using only the body heat of the occupants themselves.”
And how does our body do this regulation? There are hundreds of “thermoreceptors” located throughout our body that each send up to 240 impulses per second to the hypothalamus. This organ controls two systems: a heat-losing center and a heat-promoting center. When one center is stimulated, a concurrent signal is sent to the other center inhibiting its operations. When we get too hot, the heat-lose center signals tiny muscle fibers lining blood vessels in the skin. This decreases muscle tone and allows the vessels to dilate and become flush with warm blood shunted away from our core. Thus, the skin acts as a large radiator as it off-loads body heat and we appear “flushed.” In extreme, when we are severely heat-stressed, we are able to evaporate off up to two quarts of sweat an hour from the skin!
And when our core is threatened with becoming cold? Our marvelous body sends signals to the muscle fibers mentioned above to constrict and decrease blood flow. This reduces heat loss and our bodies retain warm blood in the deep body core. At the same time, skin temperature begins to approach that of the surrounding cold environment and we adjust our clothing if possible. If even more heat is needed, the hypothalamus can send a signal to the adrenal glands to boost cellular metabolism. The glands exude adrenaline which increases cellular burning of sugar to make heat. Our body can even produce heat rapidly by send neurological signals to muscle fibers to begin pulling rapidly against one another involuntarily—we call this shivering. In just a few minutes, this process can increase heat production by up to 400%!
The conclusion? It’s the same conclusion which can be reached upon examining so many functions just within our own body, let alone throughout the rest of creation. According to Dr. Guliuzza, “…these traits and all of the thermoregulatory processes could never have been built up gradually through some long evolutionary route of trial and error. For survival’s sake, thermoregulation has to be 100 percent in place and functional.” And I’m sure he would agree with my conclusion: we were made this way from the beginning by our God.