The nose is an integral part of respiration and olfactory sensation. Both roles include varying components and techniques that work effectively and efficiently.Know More
The nose is a cartilaginous organ on the face responsible for inhalation and exhalation of air and processing of scents and smells. Air is inhaled through the nose, and nose hairs catch the larger particles of dust and debris. Cilia and mucous in the nasal passages humidify, warm the air and catch any remaining foreign bodies before the inhaled air is passed down through the pharynx, larynx and trachea into the lungs.
Smells are processed simultaneously with respiration as the inhaled air passes over chemoreceptors, otherwise known as the olfactory epithelium. Soluble molecules are absorbed by the chemoreceptors, while proteins collect the non-soluble molecules and transport them to the chemoreceptors. All of this information is transported by axons in the olfactory nerve to the olfactory bulb. The olfactory bulb is responsible for conveying messages to the brain to organize and understand the scents inhaled.
Once all of this has occurred, the lungs exhale the left over air out through the nose to complete the cycle. In this manner, the nose is responsible for both inhalation and exhalation.Learn more about Human Anatomy
The average length of an adult male's nose is 5.8 centimeters, and the adult female's nose length average is 5.1 centimeters. The length and width of a nose increase with age.Full Answer >
While the nose reaches its adult shape by about age 10, it grows until ages 17 to 19 in men and to ages 15 to 17 in women, according to Everyday Health. While some people have the perception that noses grow in older age, the cause is gravity.Full Answer >
A person’s ears pop when he blows his nose if the action opens the Eustachian tubes that lead from the middle ears to the nose and throat. The tubes help the ears drain fluid and maintain proper air pressure in response to air pressure changes in the external environment.Full Answer >
The distinctive shape of East Asian people's eyes is caused by the presence of a small flap of skin between the nose and the eye called the epicanthic fold. This fold is present among most people of East Asian descent and has been explained as an adaptation to arctic conditions such as high glare and cold winds, according to Dr. Frank Poirier of Ohio State University.Full Answer >