Human blood is a mixture of numerous individual components. All these components have one or even several tasks and ensure that our organism functions smoothly. Here is an overview of the components and main functions of human blood.
Our blood – Components
Red blood cells. Erythrocytes are the most abundant cells in the blood. Main function: transport of oxygen from the lungs to the various body tissues and removal of carbon dioxide from the body tissue to the lungs.
Platelets. The smallest cells of the blood. main function: attaches to the injured tissue and closes it.
Generic term for the white blood cells (lymphocytes, monocytes and granulocytes) in our blood. main function: part of the immune system. Combating foreign cells by e.g. phagocytosis in blood, body tissue and lymph fluid. A detailed description can be found hier.
The fibrinogen in our blood is converted into fibrin during blood coagulation by various processes, which together with the thrombocytes forms the so-called thrombus.
The plasma proteins are formed in the liver under vitamin K influence.
The albumin in our blood binds water to itself in the blood vessels and thus prevents its escape into the surrounding tissue. A lack of albumin leads to edema (accumulation of fluid in the tissue).
Main tasks in our blood: Important function in blood coagulation, defence against foreign bodies, etc…
Cell- and protein-free blood fluid in blood and tissue fluid. Ultrafiltrate contains only small molecular substances dissolved in water, e. g: Glucose, vitamins, lactate, salts, electrolytes, etc. …
Our blood – Functions
Our blood is not only the main transporter for the substances in the following list. It also transports heat through our body.
- Lesion of a blood vessel.
- contact blood ⇔ connective tissue.
- Thrombocytes Deposition on connective tissue + bursting of thrombocytes.
- plate factor becomes free.
- Coagulation cascade is set in motion. The different plasma proteins (factor XII – III) and Ca++ finally activate prothrombin to thrombin.
- cleavage of fibrinogen into fibrin = protein filaments.
- These protein filaments form a network in which erythrocytes remain trapped.
- A sealing plug = thrombus is formed.
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