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Created with Fabric.js 1.4.5 Approximately half of the volume of whole blood consists of cells and cell products. Red blood cells (RBCs) are the most numerous cells in the body. The two top chambers are known as the left and right atria. The heart is a muscle about thesize of afist, and is roughly cone-shaped. White blood cells (WBCs) are usually outnumbered by RBCs by a ratio of 1000. WBCs are responsible for defending the bodyagainst infection, foreign cells, or toxins, and for assisting in the cleanup and repair of damaged tissues. The left ventricle pumps blood into the aorta which then carries it to the rest of the bodythrough smaller arteries. The pulmonary trunk is the large artery which the right ventricle pumps into. Cardiovascular System - Blood Cardiovascular System - Heart Homeostasis/Transport The ability of the body or a cell to seek and maintain a condition of equilibrium or stability within its internal environment when dealing with external changes The tendency of an organism or a cell to regulate its internal conditions, usually by a system offeedback controls, so as to stabilize health and functioning, regardless of the outside changing conditions. Plasma resembles interstitial fluid but it contains a unique mixture of proteins not found in other extracellular fluids. In humans, homeostasis happens when the body regulates body temperature in an effort to maintain an internal temperature around 98.6 degrees Fahrenheit. For example, we sweat to cool off during the hot summer days, and we shiver to produce heat during the cold winter season.
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