Blood: It is a fluid of connective tissue, which is carried through various blood vessels, and has physical, chemical properties that perform functions commensurate with its function.
Functions of blood components
- Red blood cells, concave spherical cells that transport oxygen from the lungs to all parts of the body, transport carbon dioxide from the body to the lungs.
- White blood cells are called red blood cells, which are present in the hemoglobin, forming a protective line of the immune system through the process of phagocytosis.
- Blood plasma: The majority of the liquid form of blood, and it has many functions; it is involved in the defense of blood, and has a role in the occurrence of blood clotting, and we transfer some types of vitamins, hormones, and drugs.
- Platelets are cells of cytoplasmic origin that are produced through the bone marrow and are associated with many tasks. They help the phagocytic cells to get rid of the microbes and release certain substances needed to shrink the blood vessels, such as serotonin, adrenaline, and histamine. On the occurrence of blood clotting, where the secretion of the factors necessary for clotting.
The role of blood in the human body
- Nutrition, through the exchange of food through the digestive system, and by blood to all cells of the body.
- Breathing, through the delivery of oxygen to all cells of the body through exchange with the lungs.
- Maintain the desired level of water inside the body.
- Output, by transferring metabolic processes from the cells of the body, and putting them through the output devices.
- A means of transport of the various hormones produced by the glands to all parts of the body you need.
- Regulate body temperature, through heat exchange between the body and the surrounding environment.
Blood clotting
It is a process of changing the physical properties of the blood, by increasing its density, as a result of the intervention of several internal and external factors. In many cases, blood clotting is necessary by causing blood clots, preventing bleeding in the injury and various causes of bleeding, Are carried out by different blood enzymes, but in cases of increased severity of blood clots, there is a fear of the occurrence of blockages of blood vessels carrying, leading to the so-called blood clot.
Causes and factors of blood clotting
- Genetic causes: lead to increased fibrinogen erythrozate, or increase histamine secretions, and others.
- Cardiovascular diseases.
- Lack of motor activity, increased levels of saturated fats in the blood, which lead to contraction of blood vessels, and the occurrence of thrombus.
- Complications of connective tissue.
- Renal syndromes.
- Aging.