XIAO XIAO
Biology 2: Human Biology
Dr. Johnson Jana
Date: 4/3/2020
ESSAY3
My first Thanksgiving party is a few years ago when I was living in New York, a professor invited me to her home for Thanksgiving party. She is Spanish, so I tasted very delicious TACO. The food into the mouth first teeth to chew your food in the mouth, the tongue will chew food with saliva stirring, saliva can make wet food, good swallow it, and a small amount of starch into sugar can make the food to swallow food, esophagus to the stomach.
The stomach has the function of storing and digesting food the stomach muscle is developed, can contract peristalsis, the stomach can also secrete has the function of digestion of gastric juice gastric contraction peristalsis so that food and gastric juice mix fully, the formation of congee like chyme; Stomach to starch and protein in preliminary gastric chyme into the small intestine. The small intestine has the function of the digestion and absorption of nutrients chyme after reaching the small intestine, and in intestinal juice bile pancreatic juice has the digestive function, such as liquid, they can be further digestion of the food into the body can absorb nutrients using nutrients absorbed by small intestine villi.
However, my family doesn’t like me to talk and laugh loudly when I eat, because in the digestive system, the digestive tract, including the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus, is the passage of food; In the respiratory system, the airways, which include the nose, pharynx, larynx, trachea, and bronchi, are the channels for air to and from the lungs. The larynx is the common passage between food and air. The trachea is in front and the esophagus is behind. When people swallow food, the larynx rises and the epiglottic cartilage tilts back, covering the larynx and allowing the food to pass through the esophagus. After the hypopharyngeal movement is completed, the epiglottic cartilage returns to its upright position for breathing. If the conversation during dinner will make the epiglottis cartilage too late to lean back, not in time to cover the larynx, leading to food “choke” into the trachea accident.