What functions does blood perform as a liquid connective tissue?

Blood performs the following functions:
* Transport – the transfer of various substances: oxygen, carbon dioxide, nutrients, hormones, enzymes, etc.
* Respiratory (a type of transport function) – the transfer of oxygen from the lungs to the tissues of the body, carbon dioxide – from cells to the lungs.
* Trophic (a type of transport function) – the transfer of basic nutrients from the digestive system to the tissues of the body.
* Excretory (a kind of transport function) transport of end products of metabolism (urea, uric acid, excess water, organic and mineral substances) to the organs of their excretion (kidneys, sweat glands, lungs, intestines).
* Thermoregulatory – heat transfer from more heated organs to less heated ones.
* Protective – the exercise of immunity; blood clotting protects against blood loss in case of injury.
* Regulatory – delivery of physiologically active substances from the sites of their synthesis to the cells of the body, which allows for the regulation of many physiological functions.
* Homeostatic – maintaining the constancy of the internal environment of the body (acid – base balance, water – electrolyte balance, etc.).

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