Swallowing is a complex act that involves the coordinated activity of the mouth, pharynx, larynx and esophagus (Figure 1). A swallow has four phases: oral preparatory, oral propulsive, pharyngeal and esophageal.3.
Sir Isaac Newton is the founder of the classical mechanics. His three laws of motion, gravitational laws, etc. are the most fundamental & basic laws of nature.
Isaac Newton was one of the worldâs great scientists because he took his ideas, and the ideas of earlier scientists, and combined them into a unified picture of how the universe works. Isaac Newton explained the workings of the universe through mathematics. He formulated laws of motion and gravitation.ir Isaac Newton Isaac Newton was born in 1642 in a manor house in Lincolnshire, England. His father had died two months before his birth. When Isaac Newton was three his mother remarried, and Isaac remained with his grandmother.