Wednesday, 1 March 2017

Human blood

Functions of blood. It supplies oxygen to cells and tissues. It supplies essential nutrients to cells, such as amino acids, fatty acids, and glucose. It removes carbon dioxide, urea and lactic acid (waste products) Its white blood cells have antibodies which defend us from infection and foreign bodies. Scientists estimate the volume of blood in a human body to be approximately 7 percent of body weight. An average adult body with a weight of 150 to 180 pounds will contain approximately 4.7 to 5.5 liters (1.2 to 1.5 gallons) of blood. Each red blood cell is about 1/3 hemoglobin, by volume. Plasma is about 92% water, with plasma proteins as the most abundant solutes. The main plasma protein groups are albumins, globulins, and fibrinogens. The primary blood gasses are oxygen, carbon dioxide, and nitrogen. Blood makes up about 8% of the human body weight. Blood consist of cellular material 99% red blood cells, with white blood cells and platelets making up the remainder.

Information from:
 https://www.kenhub.com/en/library/anatomy/the-blood
https://www.thoughtco.com/volume-chemical-composition-of-blood-601962
http://wonderopolis.org/wonder/how-much-blood-is-in-your-body
http://www.medicalnewstoday.com/articles/196001.php

Image from: http://www.fanpop.com/clubs/human-blood/images/22466864/title/blood-photo

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