The University of Massachusetts explains that peristome teeth serve as a valve that allows the spores to exit the capsule. The peristome teeth open and splay outward during times of low humidity, allowing the spores to float away and disperse.Know More
The University of Massachusetts states that the peristome teeth are one of the most characteristic features of mosses. They are formed from the remnants of the cell wall, and are fiber-like in structure. As their name, which literally means "around mouth," implies, peristome teeth form a rim around the mouth of the capsule, according to Wikipedia.
The University of Hamburg explains that all mosses except graphite mosses possess peristome teeth. The teeth are constructed from two different layers. One layer readily absorbs and releases water, while the other layer does not react very much to varying humidity levels. This causes the teeth to bend outward during times of low humidity.
The University of Hamburg states that some mosses have peristome teeth that work in other ways. For example, Funaria mosses have slits between the teeth that expand during dry periods. In other mosses, such as Polystrichum mosses, the peristome teeth do not respond to moisture. Mosses without peristome teeth have evolved other methods for dispersing their spores.Learn more about Dental
Colleen Cancio explains on HowStuffWorks that a person can straighten his teeth without braces by using aligners, retainers, contouring or veneers. Clear, plastic removable aligners are the most popular alternatives to braces.Full Answer >
People may need braces if they lose their baby teeth later than normal, if they experience abnormal jaw clicking or if their bite does not close in a matched pattern, according to Delta Dental. Chewing problems or biting the cheeks are additional indicators that braces may be necessary.Full Answer >
According to the American Association of Endodontists, tooth pain when biting down can indicate dental issues that include cracked teeth, tooth decay, damaged tooth pulp or loose fillings. It is important for individuals with tooth pain to consult with a dentist to ensure proper diagnosis and treatment. If the pulp is damaged, a root canal procedure may be needed.Full Answer >
Plaque buildup, gingivitis and gum disease can result from not brushing the teeth. In severe cases, there is increased risk for periodontitis and other serious health conditions, such as heart disease, stroke or cancer. The mouth acquires more than 600 types of bacteria that have harmful effects.Full Answer >