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.
Another Isaac Newton invention is what is known as the Calculus (another mathematician known at Gottfried Leibniz also worked on the calculus during this time). The calculus is a complex mathematical theoretical system that is today used in abstract mathematics, astronomy, geometry, financial mathematics and statistics.