What is blood about
Get Healthy Blood Flow:
Importance of having a healthy blood:
Since blood continually circulates in the body it provides a rapid fluid method of communication between all the various body regions. The cells of mammals are specialized and carry out precise complex functions; these functions can be maintained only if their immediate surroundings are kept within certain narrow limits, i.e. at constant temperature, constant acidity, etc. Blood and lymph bathing the cells play an important part in maintaining this constant internal environment.
Transport
What the blood transport is a significant reason of the need for having a healthy blood.
1. Oxygen – carried as oxyhaemoglobin in red corpuscles from lungs to respiring tissues
2. Carbon dioxide – carried from respiring tissues to lungs in these ways:
- Dissolve in plasma
- As sodium bicarbonate, after associating with sodium ions in the plasma.
- As carbomino-haemoglobin, as a result of the carbon dioxide entering the red corpuscles and reacting with haemoglobin.
Carbon dioxide diffuses from the respiring tissues into the tissue fluid spaces and then into the blood and lymph. In the lungs, the gas diffuses from the capillaries of carbon dioxide is low.
3. Simple foods – the end-products of digestion are absorbed by the villi in the small intestine. Glucose and amino-acids are carried dissolved in the plasma to the liver and then to the respiring and growing tissues, according to the requirements of the body. Fatty materials are transported in the plasma to places of fat storage, etc. when lymph vessels empty their contents into the blood stream at the neck.
4. Excretory substances – apart from carbon dioxide, this is mainly nitrogen-containing waste. Excretions from all metabolizing cells diffuse into the bloodstream and are carried to the liver, where they are converted into urea; the plasma transports dissolved urea from liver to kidneys for excretion.
5. Hormones – carried in plasma from endocrine organs which secrete them. Some, e.g. insulin affect specific ‘target organs’; others, e.g. adrenalin produce more general and widespread effects.
6. Heat – carried from main heat-generating organs (liver, muscles) to all regions of body as means of heat distribution and maintenance; also to the skin as a means of temperature regulation.
7. Antibodies and related substances.
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