How many liters of blood are there in the human body? How much plasma do we have? What happens when we get a wound? And how do transfusions work on a practical level, and how are they regulated on a legal status? It sounds like a question from We Are Like This or other educational cartoons, but how many liters of blood do we have in the human body? Knowing how to answer this question also means caring about yourself and knowing your body.
Knowing how to answer these questions also changes the perception of what we choose among the foods to nourish us, of the type of physical movement we do. From this guideline, you maybe know how much blood in the human body. Let’s see the truth.
Getting know: how much blood in the human body according to research.
The composition of the fluid we call blood is quite complicated and has its specific mass. An adult has 4.5 to 5.5 liters of blood; blood mass makes up about 8% of body weight. It is a liquid connective tissue that supplies the body with the nutrients and oxygen it needs for cellular respiration. The lighter blood is arterial, the darker venous.
Blood in the human body: what happens when we get injured
When we accidentally get hurt, the body reacts immediately. It as if a perfect repair machine set in motion which works through various stages. For example, cicatrization takes place in four superimposed phases, according to a precise system. Extraordinarily complex and efficient processes are set in motion, which stop bleeding. Our circulatory system, made up of about 100,000 km of blood vessels, blocks leaks and repairs itself.
Once the bleeding stops, inflammation starts. The blood vessels that initially narrowed to reduce blood loss in the next phase do the opposite: they dilate to increase blood flow to the wound area. It then happens that a fluid rich in proteins causes the affected part to swell; the job of this fluid is to dilute toxins and remove damaged tissue. In all these stages, millions of molecules and specialized cells are produced.
Transfusions, donations, the law in Italy
It cannot be said that at the regulatory level, the legislator has been dormant from 2002 until today regarding the reforms regarding transfusions. In particular, in the three years 2005-2007, there the most intense and essential national and community legislative production on the subject of transfusion activities recorded to date. In those years, many rules were redefined regarding the protocols for ascertaining blood and blood components donors’ suitability, in the following two years, decisions made regarding the traceability of blood and blood components intended for transfusions.
Within two weeks, the cells that form fibers on the wound go to the damaged area and multiply. New capillaries branch out in the direction of the injury; specific cells are generated that close it. If it is accompanied by a fracture, the bones slowly regain strength, and the fibers formed on the injured soft tissues replaced by more resistant materials. This is extraordinary planned coordination in all respects.
The pursuit of self-sufficiency of blood
Very important, the Legislative Decree 6 November 2007, n. 191 on the “Implementation of Directive 2004/23 / EC on the definition of quality and safety standards for the donation, procurement, control, processing, conservation, storage and distribution of human tissues and cells”. For information on the transfusion system in Italy, please refer to the official website where the directives of the Ministry of Health on the voluntary donation, the protection of citizens’ health, and the pursuit of self-sufficiency of blood, blood components, and blood products as a national strategic goal well explained. not divisible and sustainable with the contribution of all the players in the system.
Human blood a liquid that varies in color from ruby red to purplish-red depending on the amount of oxygen bound to hemoglobin. It has a viscosity about 4 times higher than that of water and a specific weight of 1.041-1.062 g / cm ³. Therefore only slightly higher than that of water.
Mass constitutes of body
In humans, blood mass constitutes approximately 7.7% of body weight and has a pH (arterial) of 7.38 – 7.42. An adult has an average of 4.5 to 5.5 liters of blood, while children have slightly less. The weight of the blood contained in the body of an adult generally fluctuates between 4.5 and 5.5 kg. You can get a good approximation of the amount of blood in your body, calculating 7.7% of your body weight. For example, an individual weighing 65 kilos has about 5 liters of blood, which weighs about 5 kilograms.
The blood a connective tissue in a liquid state, for this also called tissue fluid. Flowing in the human body by means of the blood vessels (arteries and veins). Blood a tissue because it a collection of similarly specialized cells that perform particular functions. However, these cells suspended in a liquid matrix ( plasma ). It makes the blood fluid.
A final word on how much blood in human body
On average, in the human body of an adult person, there are 4 to 5 liters of blood and these represent about 7% of the weight total body. Its movement within the vessels allows it to reach all organs and tissues, performing many essential functions for life. In addition to providing oxygen, a fundamental element for the life of cells, blood allows the transport of nutrients and the removal of harmful ones. The cells and molecules of the immune system also flow in the blood, which defends the body from microorganisms and other harmful elements. Now you are clear about how much blood in human body. Thanks for reading.