Zero is the only integer (whole number) that is neither positive nor negative. In a sense, zero makes negative numbers possible, as a negative number added to its positive counterpart always equals zero. When zero is added to or subtracted from a number, it leaves the number at its original value. Zero is essential as a position holder in the system known as positional notation. In the number 203, for example, there are two hundreds, zero tens, and three ones. Zero indicates that the value of the tens place is zero. In the number 1024, zero indicates that the value of the hundreds place is zero. Scientists use the term absolute zero (0Â° Kelvin) to refer to the (unattainable) theoretically lowest possible temperature, at which the kinetic energy of molecules is zero.
The thin, flat muscle forming the wall of the cheek. buccinator. the main muscle of the cheek, one of the 12 muscles of the mouth. It is pierced by the duct of the parotid gland opposite the second molar tooth. The buccinator, innervated by buccal branches of the facial nerve, compresses the cheek, acting as an important accessory muscle of mastication by holding food under the teeth. Buccinator.
Buccinator Anatomy Study: Origin, Insertion, Action and Innervation. Origin: Attaches to the alveolar process of the maxilla and the mandible of the opposing molar, as well as the pterygo-mandibular raphe. Insertion: Attaches to the orbicularis oris and the fibers from the deep portion of the lips. Action: Compresses the cheek. Innervation: Buccal branch of the facial nerve (cranial nerve VII) Blood Supply: Branches from the facial artery. Primary Action of the Buccinator Muscle: