Types of motor

Classified in Biology

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white blood cells           red blood cells              platelets

size.                                   - m.A                           -cell.F
nucleus                             -nucleus                     -nucleus:absent
types:- basophil:3g         -shape:biconcave       -function:help blood to clot
          -eosinophil:2g      -essencial.C:                  by forming a plug to close
          -neutrophil:4g        haemoglobin              small breaks in the blood
          -lymphocyte:1n                                         vessels.

-they carry blood away from the heart
-size:larger near the heart, thinner and smaller arterioles farther from the heart
-Arterial wall: thnik and elastic
-"" from the organgs to the heart
-size:venules(thin veins) farther from the heart, larger thicker veins closer to the heart
-Veins wall: thin not very elastic
-valves: prevent blood from flowing backwards
-They connect arterioles and venules
-size: tiny
-Capillary walls: one layer of flat cells, the capillary endothelium.It facilites the exchange of gases, nutrients and waste between the blood and the cells.

The cardiac cycle: consits of one complete sequence of contraction(systole)and relaxtion(diastiole) of the heart, this cycle occurs durnig each heartbeat
-Artial systole: both ventricles fill with blood, both atria contract pushing blood through the tricuspid and mitral valves into the ventricles.
-Ventricular systole: both ventricles contract, the pulmonary and aortic valves open, and blood is pushed through the pulmonary artery and aorta
-Diastole: the atria and ventricles relax, the aortic and pulmonary valves are closed, atria fill with blood, atrioventricular valves open.

Healty habits for circulatory/excretory
-don't smoke                                                        drink a lot of liquids
-eat low-salt diet                                                 eat a balanced diet
-lead clam but active life                                    limit salt in your diet
-avoid high-fat diets                                           avoid self-mediacation
-drink at least two liter of water every day         maintain good hygine 
-do moderate-intensity exercice every day       of the external genital area

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