The excretory system is a collection of organs that allow for the removal of waste from the body. The liver and kidneys function to remove a variety of waste by-products from the body.
As nutrients from food get absorbed by the small intestine, anything not required passes through to the large intestine. Within the large intestine, any excess water, minerals and vitamins are absorbed before the solidified waste is passed through to the rectum to leave as feces. The blood itself may have excess levels of certain chemicals, in particular amino acids, which are harmful to the body if large amounts build up. The liver works to convert these amino acids into urea which is then processed by the kidneys to leave the body as urine.Learn More
The skin releases toxins from the blood via the sweat glands and pores; these highly vascular, coiled, tubular glands remove waste products from the blood and discharge them from the body in the form of sweat. Sweat is a transparent acidic fluid that contains sodium chloride, water and some urea.Full Answer >
The digestive system involves the mouth, throat, esophagus, stomach, small intestine, large intestine, pancreas, liver and gallbladder. The main organs involved in digestion include the esophagus, stomach, and the small and large intestines.Full Answer >
Some of the most vital organs of humans are located in the thoracic cavity, including the lungs and the heart. HowStuffWorks explains that when a person inhales, the diaphragm and muscles between the ribs expand the thoracic cavity to reduce the pressure inside the body to a level that is lower than the pressure of the air outside the body. As a result, the lungs pull air through the body's airways.Full Answer >
The sense organs take in sensory information that gets sent to the brain, and the body acts on these messages. The sense organs are those responsible for the ability to experience the five senses, which are touch, smell, taste, hearing and sight.Full Answer >