Blood

In humans, red blood cells are formed in a process called erythropoiesis in the red bone marrow. In early fetal development, the liver is the primary site of erythropoiesis.

Erythropoiesis is regulated by a hormone called erythropoietin. Stem cells typically develop into mature red blood cells in seven days, then leave the bone marrow as reticulocytes.

Platelets, which help the blood to clot. Clotting stops the blood from flowing out of the body when a vein or artery is broken. Platelets are also called thrombocytes.

Red blood cells, which carry oxygen. Of the 3 types of blood cells, red blood cells are the most plentiful. In fact, a healthy adult has about 35 trillion of them. The body creates these cells at a rate of about 2.4 million a second, and they each have a life span of about 120 days. Red blood cells are also called erythrocytes.

White blood cells, which ward off infection. These cells, which come in many shapes and sizes, are vital to the immune system. When the body is fighting off infection, it makes them in ever-increasing numbers. Still, compared to the number of red blood cells in the body, the number of white blood cells is low. Most healthy adults have about 700 times as many red blood cells as white ones. White blood cells are also called leukocytes.

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STANDARD HEMATOLOGY: Platelets, or thrombocytes, are small, colorless, enucleated bodies. They are produced in the bone marrow by fragmentation of megakaryocytes. Megakaryocytes are large cells found in bone marrow that produce platelets by fragmenting their cytoplasm. Platelets play a vital role in the hemostatic process, which prevents blood loss. When the endothelial lining of a blood vessel is traumatized, platelets are stimulated to go to the site of injury, where they form a plug that helps reduce blood loss.

my hands fall asleep at night if i have them positioned above my head

If it keeps occurring though,especially with morning symptoms of numbness and tingling,and you have risk factors of repetitive hand use,diabetes,obesity,arthritis etc... you may have carpal tunnel syndrome(CTS).A condition caused from pressure or damage to the median nerve that runs through your wrist joint.

Existing CTS can be aggravated by sleeping with wrists in a bent position,then when you wake up,you shake them to "get them awake."

Most people assume (incorrectly) they have a blood circulation problem,when in fact it's a crimped nerve problem.Sleeping in night or nocturnal braces often help.

Learn more at carpal-tunnel-symptoms.com

As strange as it might seem try stopping drinking coffee or tea and its not the Caffine so I include DeCaffinated as well. Once I stopped so did the problem.

granulocytes include :

neutrophils-most numerious of the white blood cells,

basophils- rarest white blood cell of the leukocyte population, they contain histamin containing granules, attracks other white bloods cells to the inflamed site

eosinophils -about the same size of neutrophils and look a old fashion telephone receiver that has 2 lobes, they are lack enzymes that digest bacteria. The lead counter attacks against worms, all roughly spherical in shape. They are larger and live shorter time periods then erythrocytes, they are lobed nuclei and are phagocytes

Agranulocytes include:

Lymphocytes-most 2nd numerous in the blood, nucleus is spherical but may be lightly dented. They play a role in T cells and B cells

Monocytes- abundant pale blue cytoplasm and are U or blue kidney shaped

YOU can remember by the letters of the names:

Never---Neutrophil

Let---Lymphocytes

Monkeys--Monocytes

Eat----Eosinophil

Bananas-- Basophils

Information can be found in Anatomy and Physiology by Marieb 8th Edition

Segmenters (Polys) : 0.50 to 0.65