Types of motor
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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.
-monocyte:1r
Arteries:
-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
Veins:
-"" 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
Capillaries:
-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