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Individual differences |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |
Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)
- Red blood cell, whose main purpose is the transport of oxygen;
- White blood cell, which produces antibodies to fight infection;
- Platelet, which is actually a fragment of the large bone marrow cells known as megakaryocytes and are important in blood clotting.
Together, these three kinds of blood cells sum up for a total 45% of blood tissue (55% is plasma).