Cardio-vascular system, which includes circulatory organs, tissues, and supplies the internal organs vital nutrients and oxygen, removes waste substances from the body and carbon dioxide, and together with the nervous system coordinates the work of the organs and systems of the human body.
Blood (sanguis) is a connective tissue formed by formed elements that make up 30-40%, and the intercellular substance - the plasma is 60-70%. Forming elements are classified into white blood cells, red blood cells and platelets. White blood cells are granular, that is, containing granules in the cytoplasm, and nezernistymi. The former include basophilic, neutrophilic and acidophilic granuloidy. The second, called agranuloidami fall into monocytes and lymphocytes. Lymphocytes, in turn, are divided into B-lymphocytes and T lymphocytes, or thymocytes. In humans, forming elements are present in a certain proportion, which was called of the blood or hemogram. In a normal healthy human blood formula is as follows:
- Basophils - 0.5-1%;
- Neutrophils - 50-60%;
- Eosinophils - 1-5%;
- Monocytes - 5-8%;
- Lymphocytes - 25-30%.
The deviation from the formula is the measure of the body, so a blood test is of great importance in the diagnosis of various diseases.
The circulatory system is a large number of interconnected vessels (arteries, veins, capillaries), differing in size and structure.
a., aa. — arteria, arteriae (artery, the artery)
lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)
m., mm. — musculus, musculi (muscle, the muscle)
n., nn. — nervus, nervi (nerve, the nerve)
r., rr. — ramus, rami (branch)
s. — seu (or)
v., vv. — vena, venae (vienna)