Amazing Facts of Circulatory System of Human Body

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The Heart (Cardiovascular), Lungs (Pulmonary), and arteries, veins, coronary and portal  vessels (Systemic) are the three independent systems in the human body. These systems work together and make Human Circulatory System that is responsible for the circulation and transportation of blood, nutrients, Oxygen and various others gases, hormones, blood cells to and from the cells in the body. The system provides nourishment, helps to fight diseases, and maintain various processes in the human body.

Blood Volume 6.8 Litres (in 70 kg body)
Normal B.P. 120/80 mm Hg
Number of R.B.C. In Male: 4.5-5.0 Million/Cubic MM
In Female: 4.0-4.5 Million/Cubic MM
Life Span of R.B.C. 120 days
Normal W.B.C. Count 5000-10000/Cubic MM
Life Span of W.B.C. 3-4 Days
D.L.C. (Differential Leucocyte Count) Basophils 0.5-1%
Eosinophils 1-3%
Monocytes 3-8%
Neutrophils 40-70%
Lymphocytes 2-25%
Blood Platelets Count 2,00,000-4,00,000/Cubic MM
Haemoglobin In Male 14-15.6 gm/100 cc of blood
In Female 11-14 gm/100 cc of blood
Hb Content in Body 500-700 gm
Universal Blood Donor O Rh –ve
Universal Blood Recipient AB
Blood Clotting Time 2-5 Minutes
Normal Heart Beat (or Pulse Rate) 72-75/Minutes
Largest Artery Abdominal Aorta
Largest Vein Inferior Venacava
Largest W.B.C. Monocyte
Smallest W.B.C. Lymphocyte
ESR (Normal Erythrocyte sedimentation rate) 4.10 min/hour
pH of Blood
pH of Semen 7.5
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