The chemoreceptors of the tongue
By: Alicia M Prater PhD
Each human tongue contains an average of roughly 10,000 chemoreceptors. These microscopic hair-like nerve endings, called microvilli, are encapsulated in a protective envelope on a short stalk, called papillae. These buds sense chemicals in food, giving them their flavor. These "taste buds" are also...
The sense of taste: Different tastes picked up by the human tongue
By: Alicia M Prater PhD
Taste is the sensing of flavor in food and other material that is ingested. Taste is possible because chemicals stimulate receptors on the tongue, the taste buds. How something tastes can tell an individual whether that something is food or inedible, like cardboard, and toxic...
By: Donna M. Houston
Blood. Sexy, with an "ewww" factor. The mere sight of the sticky, red substance is enough to make the faint-hearted faint and the Edward Cullens' of the world salivate. In ancient Greece Hippocrates saw it as one of the Four Humors responsible for a...
By: Dr Pandula Siribaddana
Swallowing is the process in which the food taken via mouth is mechanically broken down, made into a bolus, passed on to the pharynx and send down the esophagus into the stomach. All these actions are taken by sealing off the nasal passages as well...
By: Dr Pandula Siribaddana
Introduction: Saliva is a secretion made from the salivary glands located around the oral cavity. There are three types of such glands and Submandibular glands contribute to at least 70% of the total salivary secretions whereas the Parotids only contribute to about 25%. Even though...
What are sinuses?
By: Eric Lannak
The sinuses are usually written off as “four pairs of air-filled chambers in the facial bones that connect to the nose”, but for the 35 million who suffer from chronic sinus problems in the U.S. alone, or the 500,000 who will have...
DNA replication errors
By: Elisa Sala
DNA is a double stranded helix, constituted by four nucleic bases: adenine, thymidine, cytosine and guanine. Two strands of double helix are linked through hydrogen bonds, weak chemical bonds between adenine- thymidine and cytosine- guanine. These bonds guarantee to keep constant the distance between two...
By: Connie Earl Robertson
The thyroid gland is a small gland, normally weighing less than one ounce that is located at the base of the voice box. It is part of the endocrine system. Its basic job is to take iodine from the foods a person eats and convert...
By: Dr Pandula Siribaddana
Introduction: Nasogastric tube or NG tube in shorten form, is a tube inserted through a nostril into the stomach. The passage will provide many advantages in certain kinds of disease entities. The uses can very from decompressing the stomach, obtaining a sample of the gastric...
By: Dr Pandula Siribaddana
A nasogastric tube or NG tube is a device which is inserted through a nostril and ends up in the stomach. The device expects to function in different capacities in different patients. Most often, the necessity to put an NG tube is for feeding purposes...

 

1 153 154 155 156 157 296