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
Gray teeth can be caused by staining of the tooth enamel, internal damage to the tooth and the use of antibiotics at a young age, according to More and Crest. While staining and antibiotic damage can be reversed using tooth whitening and bleaching products and services, if gray teeth are caused due to internal damage, More claims that bleaching and whitening does not help the problem.Full Answer >
Teeth may shift out of place for several reasons, some of which include periodontal disease, temporomandibular joint dysfunction, faulty dental work and missing teeth, explains Daxon & Grundset Dentistry. Habitually biting pens or other small objects can also cause the teeth to change position over time, notes Everyday Health.Full Answer >
According to the American Association of Endodontists, tooth pain can be a symptom of a wide variety of dental problems including decay, injury or infection. While mild sensitivity can be linked to receding gums and poses little harm, other dental pain can signify a more serious problem and requires a trip to the dentist for a diagnosis and treatment plan.Full Answer >
There are several ways to strengthen teeth. These methods include regular brushing, attending periodic dental checkups, avoiding sugary foods, consuming foods rich in calcium, eating foods rich in vitamins and minerals, and drinking lots of water.Full Answer >