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 born on January 4, 1643. His insights laid a foundation for our modern understanding of celestial motion, light and gravity. January 4, 1643. Isaac Newton, who was born on this date, was an English physicist and mathematician. Heâs remembered as one of the worldâs greatest scientists, because his insights laid a foundation for our understanding of celestial motion, light and gravity.