Essay On Human Respiratory System

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The human anatomy is the scientific study of the morphology of the adult human. A digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. The main functions of the mouth include mastication, tasting foods, and speech. The salivary glands are accessory organs that produce a watery secretion known as saliva.The body also uses saliva to lubricate food as it passes through the mouth, pharynx, and esophagus. The esophagus carries food, liquids, and saliva from the mouth to the stomach. Partial digestion takes place in the stomach. The main function of the small intestine is an absorption of nutrients and minerals. The major function of the large intestine is to absorb water from the remaining indigestible food matter and transmit the useless waste material from the body.
The excretory system maintains water, ion, and nitrogen balance within the body and eliminates wastes. The reproductive system creates new individuals of a species. Both the excretory and reproductive systems are under endocrine control but are also influenced by the external environment. The kidneys extract waste from blood, balance body fluids and form urine. The kidneys filter the blood to remove wastes and produce urine. …show more content…

The function of the nasal cavity is to warm, moisturize, and filter air entering the body before it reaches the lungs. The pharynx connects the nasal and oral cavities with the larynx and esophagus. The larynx houses the vocal cords and manipulates pitch and volume, which is essential for phonation. The trachea has the vital function of providing air flow to and from the lungs for respiration. The main function of the epiglottis is to seal off the windpipe during eating, so that food is not accidentally inhaled. The diaphragm is the primary muscle used in the process of inspiration or

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