Blood is a suspension
Consists:
blood plasma (90% water)
Hormone
electrolytes
Nutrients (glucose etc.)
Red blood cells (erythrocytes) (25 million throughout the body, made up of 30 percent hemoglobin, live an average of only 120 days, have no nucleus or mitochondria, and are made in the bone marrow)
Subgroups of leukocytes: lymphocytes and monocytes)
White blood cells (lymphocytes) (8000 per microliter, can live for a few days or years, go through blood tissue and lymph, task is the defense)
Platelets (thrombocytes) (250000 per microliter, lifespan 10 to 12 days, rough surface)
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