المرجع الالكتروني للمعلوماتية
المرجع الألكتروني للمعلوماتية

English Language
عدد المواضيع في هذا القسم 6095 موضوعاً
Grammar
Linguistics
Reading Comprehension

Untitled Document
أبحث عن شيء أخر
غزوة الحديبية والهدنة بين النبي وقريش
2024-11-01
بعد الحديبية افتروا على النبي « صلى الله عليه وآله » أنه سحر
2024-11-01
المستغفرون بالاسحار
2024-11-01
المرابطة في انتظار الفرج
2024-11-01
النضوج الجنسي للماشية sexual maturity
2024-11-01
المخرجون من ديارهم في سبيل الله
2024-11-01

معنى التربية
24-5-2017
أعدام المعترضون لعبة سياسية
7-8-2016
أنواع استراتيجيات الشركات المتعددة الجنسيات
26-1-2022
التهاب الكبد من نوع G
2024-07-01
باب أم وأو والفصل بينهما
2024-09-08
دردار، مرار، قنطريون فخي Centaurea calcitrapa
2-8-2019

Teeth, lips, mouth, larynx and pharynx  
  
441   09:05 صباحاً   date: 6-1-2022
Author : George Yule
Book or Source : The study of language
Page and Part : 1-4


Read More
Date: 2024-01-17 257
Date: 8-1-2022 744
Date: 26-2-2022 299

Teeth, lips, mouth, larynx and pharynx

Human teeth are upright, not slanting outwards like those of apes, and they are roughly even in height. Such characteristics are not very useful for ripping or tearing food and seem better adapted for grinding and chewing. They are also very helpful in making sounds such as f or v. Human lips have much more intricate muscle interlacing than is found in other primates and their resulting flexibility certainly helps in making sounds like p or b. The human mouth is relatively small compared to other primates, can be opened and closed rapidly, and contains a smaller, thicker and more muscular tongue which can be used to shape a wide variety of sounds inside the oral cavity. In addition, unlike other primates, humans can close off the airway through the nose to create more air pressure in the mouth. The overall effect of these small differences taken together is a face with more intricate muscle interlacing in the lips and mouth, capable of a wider range of shapes and a more rapid and powerful delivery of sounds produced through these different shapes.

The human larynx or “voice box” (containing the vocal folds or vocal cords) differs significantly in position from the larynx of other primates such as monkeys. In the course of human physical development, the assumption of an upright posture moved the head more directly above the spinal column and the larynx dropped to a lower position. This created a longer cavity called the pharynx, above the vocal folds, which acts as a resonator for increased range and clarity of the sounds produced via the larynx and the vocal tract. One unfortunate consequence of this development is that the lower position of the human larynx makes it much more possible for the human to choke on pieces of food. Monkeys may not be able to use their larynx to produce speech sounds, but they do not suffer from the problem of getting food stuck in their windpipe.