Humans are the most interesting organism on earth to study, and there are a lot of things that we do not know about ourselves or that we believe in that are wrong. Our bodies hold lots of misconception, and we just want to believe in those misconception but today, I will like to differentiate facts from misconceptions, and truth from myths.
Let's start with the notion that a significant amount of body heat escapes through our heads. You've probably heard that up to 40-45% of heat loss occurs via the head, making you wonder just how hot your cranium might be. However, this isn't entirely accurate. The truth is that our heads lose heat much like any other part of our bodies. Studies from the University of Manitoba have revealed that we lose approximately 7-10% of body heat through our heads, primarily because it's one of the most exposed areas.
As a biology student, you must have heard of the word Appendix, or the condition appendicitis. As you have heard of that, there is a high possibility that you were told that the appendix is completely useless, and just there to cause you pain the day you suffer from appendicitis which would then send you to the operating theater. While currently, the risk of leaving an appendix when it is inflamed beats the gains, this doesn't mean that the appendix is completely useless.
In reality, the appendix houses immune system tissues and may serve as a sanctuary for beneficial bacteria, helping maintain gut health before these microorganisms confront harmful counterparts.
The first misconception we have is that the tongue has a taste map where different part taste different things. This misconception dates back to 1901 when a study was published showing different part of tongue being sensitive to certain type of tastes than others. This believe has given the tongue a map of sweet, sour, bitter, salty taste and Umami regions. Actually, the tongue doesn't determine taste, and although it is filled with tastebuds, it is the brain that determines taste.
Each taste bud comprises around 100 taste receptor cells, each responding to various substances in our food. An intriguing study even demonstrated that a mouse's brain could make them perceive sweetness while consuming a bitter substance. In essence, the brain imparts meaning to these tastes, regardless of which part of the tongue encounters them.
I have heard this over and over that no two persons have identical fingerprint. We all have patterns at the end of our fingers, and they are referred to as friction ridges and they are connected to sweat glands that secret sweat. Fingerprints are unique and although they are of three types the whorl, loop, are arch, and these patterns can be on all fingers in the hand.
These fingerprints are differentiated with ridge paths, breaks, and forks although still the same type of fingerprint. So while this will give distinctive pattern to your fingerprint, there are a possibility that a person could suffer for a crime they did not commit because there are certain similarities in fingerprint patterns even when not identical.
Another misconception I want to clear her is dark urine and dehydration. It is believed that when urine is not clear, then a person requires more water in the body, since ADH is doing its job to enable the kidney absorb water back into the body thereby lowering the volume of urine and increasing its concentration but then, this isn't the situation at all times.
Factors like diet, certain fruits, medications, and various medical conditions can influence urine color. Therefore, relying solely on the color of urine as a hydration indicator may not be accurate. Overhydrating by excessively diluting urine with water can lead to hyponatremia and potentially mask symptoms of underlying health conditions that can be detected through urine analysis.
In the world of human physiology, it's crucial to separate fact from fiction. Our understanding of the human body is continually evolving, and it's important to stay informed and question common misconceptions. By shedding light on these myths, we can develop a more accurate and comprehensive knowledge of our remarkable biology.
