The function of the pharynx is to transfer food from the mouth to the esophagus and to warm, moisten and filter air before it moves into the trachea. The pharynx is a part of both the digestive and respiratory systems.Know More
The pharynx, which is located behind the mouth and nose, is also known as the throat. When food is pushed to the back of the mouth by the tongue, the trachea or windpipe closes, and the food moves into the pharynx. Then, a combination of both voluntary and involuntary muscles work to swallow the food, forcing it into the esophagus, which moves it along to the stomach. A thick lining in the pharynx protects it from rough food particles and harsh chemical food components.
When not being used to transfer food, the pharynx provides a place for air to warm up and acquire the proper humidity levels before it enters the trachea and moves into the lungs. Air passes through the nose or the mouth directly into the pharynx. The mucous lining of the pharynx filters dust particles and other contaminants out of the air. The air then flows through the larynx at the top of the trachea and continues on to the lungs.Learn More
Colorado State University states that bile salts play a role similar to a detergent in the digestion of fat by emulsifying the hydrophobic fat molecules. The tiny suspended particles of fat that result from this are much more accessible to enzymes necessary to digest them than the larger drops that would remain without bile salts. The bile salts are also critical in the absorption of fat-soluble vitamins, which include vitamin D.Full Answer >
The tricuspid valve is the flaplike structure that separates the right atrium of the heart from the right ventricle, according to About. This valve opens with each stroke to permit blood flow from the atrium to the ventricle. Afterwards, it closes to prevent backflow into the atrium.Full Answer >
The respiratory system draws in fresh air from the environment, exchanges oxygen for waste gases in the lungs and expels the spent air back into the environment before taking another breath. The oxygen is then circulated through the body to fuel the metabolism of the cells.Full Answer >
Professor Tim Jacob of Cardiff University, writing for the Physiological Society, states that scientists believe that women have more taste buds than men because of evolution. Women are responsible for the health of their babies, so it was evolutionarily important for women to immediately recognize the tastes of toxins that might harm a child.Full Answer >