PHYSIOL 201 Chapter Notes - Chapter 1: Fluid Compartments, Extracellular Fluid, Homeostasis
30 Jan 2019
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Document Summary
About 37 trillion cells in the human body. Because cells are a great distances away from the external environment, a circulatory system is required to bring nutrients close to the cells and to remove waste products produced by cells. The gi tract (digestive system) breaks macromolecular nutrients like proteins, fats, and carbohydrates into components that can be absorbed into the blood and then be delivered by the circulatory system to the body"s cells. The respiratory system brings oxygen (o2) into the lungs where it can diffuse into the blood to be delivered to the body"s cells. Carbon dioxide (co2) is a waste product produced by cells that is carried by the blood to the lungs where it can diffuse into the air sacs and then be exhaled. The kidneys (urinary system) is involved in filtering the blood and excreting waste products along with adjusting concentrations of things like h+, inorganic ions (salts), and water in the blood.
