Blood. What does blood do?
I think that we all take blood for granted. Especially when discussing philosophical questions such as consciousness and mind and such. What philosopher wants to discuss blood? What psychiatrist wants to discuss blood? Surgeons have to deal with blood all the time……They understand blood.
To Be continued…..
Blood is a vitally important fluid for the body. It is thicker than water, and feels a bit sticky. The temperature of blood in the body is 38°C (100.4°F), which is about one degree higher than body temperature. How much blood you have depends mostly on your size and weight.
Blood has three important functions:
The blood transports oxygen from the lungs to the cells of the body, where it is needed for metabolism. The carbon dioxide produced during metabolism is carried back to the lungs by the blood, where it is then exhaled (breathed out). Blood also provides the cells with nutrients, transports hormones and removes waste products, which organs such as the liver, the kidneys or the intestine then get rid of.
The blood helps to keep certain things in the body in balance. For instance, it makes sure that the right body temperature is maintained. This is done both through the liquid part of the blood (plasma), which can absorb or give off heat, as well as through the speed at which the blood is flowing: When the blood vessels expand, the blood flows more slowly and this causes heat to be lost. When the temperature outside the body is low, the blood vessels can contract to reduce the amount of heat lost. Even the pH value of the blood is kept at a level ideal for the body. The pH value tells us how acidic or alkaline a liquid is. A constant pH value is very important for things in the body to function properly.
This involves solid parts of the blood such as blood platelets and various substances that are dissolved in the blood plasma. If a blood vessel is damaged, these parts of the blood stick together (clot) very quickly and make sure that a scrape, for instance, stops bleeding. This prevents large amounts of blood loss. White blood cells and certain chemical messengers also play an important role in the immune system.
Cologne, Germany: Institute for Quality and Efficiency in Health Care (IQWiG); 2006-. https://www.ncbi.nlm.nih.gov/books/NBK279392/
So blood is an important part of health and it is very complex and problems concerning any one of the three functions of blood can and will cause problems for the brain and for the mind, many reversible, if recognized and treated.