Top 7 Facial Features Kids Often Ask About and Scientific Answers - Mytour.vn

Tell the Kid: Studies show that when one nostril is blocked, a series of reflex mechanisms occur to protect the nose, ensuring the body continues to breathe. The respiratory system then fully shifts to the other nostril. Secondly, having two nostrils enhances body movement, making respiration more efficient and boosting the entire metabolic process.

Need to Know: Our aquatic ancestors had two front nostrils for water intake and expulsion. Back then, the nose was solely for breathing, not for smelling. Nasal evolution began when land vertebrates coordinated the relocation of the nostrils. Initially situated in the dental arch, they later shifted to the palate. Today, besides breathing through two nasal cavities, we can also detect smells of food and beverages. Scientists have proven that the second nostril not only enhances olfaction but also improves breathing. Smelling 50% of an odor in each nostril enhances perception compared to using just one nostril.

Tell the Kid: The lip skin lacks Melanocytes, thus there's no melanin to provide skin pigmentation. Additionally, lips are rich in blood vessels, and their thin epidermis makes the red hue of the blood vessels highly visible. This explains how the bright red color of blood is transformed into the rosy red of our lips (the color of blood vessels passing through the lip's three layers).

Need to Know: The skin on our lips differs from the rest of our body's skin, likely due to its thinner nature. Skin typically consists of three distinct layers: Epidermis, Dermis, and Hypodermis. The Epidermis is the outermost layer of skin that we can see and touch, composed of dead cells, serving to protect us from toxins, bacteria, and prevent loss of essential fluids. The lip skin lacks Melanocytes, thus there's no melanin to provide skin pigmentation. Additionally, lips are rich in blood vessels, and their thin epidermis makes the red hue of the blood vessels highly visible.

Tell the Kid: There's a divine logic behind human anatomy. Just think about it, our bodies are designed with remarkable coherence. Our two eyes are placed in front to keep us constantly facing forward, not looking back.

Need to Know: No scientific study has conclusively explained why tears are in front. However, we can offer explanations through folklore. There's a divine logic behind human anatomy. Just think about it, our bodies are designed with remarkable coherence. But why don't we use it as intended: Our two eyes are placed in front, because it's meant for us to always look forward, not to constantly dwell on what's behind us.

Tell the Kid: This may relate to other facial, head, or neck movements; excessive blinking could stem from issues with eyelids, habits, refractive errors, dry eyes, and even stress. The primary purpose of blinking is to cleanse and moisturize the eyes, safeguarding them by sweeping away tiny dust particles or irritants.

Need to Know: We all blink, mostly involuntarily and unconsciously. Sometimes we blink as a reflex to external stimuli, like a sudden insect appearing before your eyes. We even blink naturally to brighten our vision or when our eyes feel fatigued. When we blink, the brain repositions the eyeballs so we can continue focusing on what we're observing. During the blink, the eyeballs move back to their socket position, and upon reopening, they often don't return to their original position. This immediate lack of synchronization prompts the brain to activate eye muscles to readjust our vision, sometimes recalibrating the blink timing accordingly.

Tell the Kid: Eyelashes serve to shield the eyes from harmful airborne particles like dust, debris, and sand. They help prevent these particles from falling into the eyes. Eyelashes also safeguard the eyes from sweat or raindrops. Their upward curvature is the most effective way to deflect water droplets from seeping into the eyes.

Need to Know: Eyelashes are composed of 97% keratin and 3% water. They form on the fetal epidermis around weeks 22 to 26 of gestation. If plucked, eyelashes take 7 to 8 weeks to grow back, but continuous plucking can lead to permanent damage. The color of eyelashes may differ from hair color, typically darker in individuals with darker hair and lighter in those with lighter hair. Eyelashes are unaffected by hormones, hence they're not influenced by puberty. Their main function is to protect the eyes from harmful airborne particles like dust, debris, and sand. They also shield the eyes from sweat or raindrops. Their upward curvature is the most effective way to deflect water droplets from seeping into the eyes. Their biggest role is in preventing excessive sunlight from reaching the eyes, acting as filters for direct sunlight while simultaneously preventing dust from entering the eyes.

Tell the Kid: Wisdom teeth are actually the term used to refer to the last molars on each side of the upper and lower jaws, also known as the eighth teeth. These teeth don't appear in children when they first develop teeth or when they've already replaced their baby teeth; instead, they typically emerge in adults aged 18 and older. They're called wisdom teeth because they often emerge when a person has reached adulthood, at an age considered wise enough to be fully aware of everything.

Need to Know: Due to their late eruption, the human mouth often lacks adequate space for wisdom teeth to grow normally. As a result, wisdom teeth may erupt at an angle, overcrowding, or impacting adjacent teeth, leading to swelling and pain. Many cases involve impacted or misaligned wisdom teeth left untreated, causing swollen gums prone to food accumulation, leading to bad breath, gum inflammation, etc. Due to their late appearance, wisdom teeth must undergo the process of tooth eruption and maturity before they can begin to emerge above the gum line. Many people experience difficulties with wisdom teeth eruption, causing considerable pain and inconvenience. Therefore, for many individuals, wisdom teeth serve little to no aesthetic or chewing function.