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.
Newtonâs Laws of Motion. A painting of Sir Isaac Newton by Sir Godfrey Kneller, dated to 1689. Sir Isaac Newton's three laws of motion describe the motion of massive bodies and how they interact. While Newtonâs laws may seem obvious to us today, more than three centuries ago they were considered to be revolutionary. Newton was one of the most influential scientists of all time.