MICROANATOMY

BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS

BLOOD

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Small cell fragments that are derived from certain cells in the bone marrow.
A
platelets
B
plasma
C
albumins
D
globulins
Explanation: 

Detailed explanation-1: -Platelets, or thrombocytes, are small, colorless cell fragments in our blood that form clots and stop or prevent bleeding. Platelets are made in our bone marrow, the sponge-like tissue inside our bones. Bone marrow contains stem cells that develop into red blood cells, white blood cells, and platelets.

Detailed explanation-2: -Platelets are small fragments of cytoplasm derived from bone marrow cells called megakaryocytes (mega = large + karyon = nucleus + cyte = cell).

Detailed explanation-3: -Platelets are made from very large bone marrow cells called megakaryocytes. These are formed in the myeloid part of the tree. When megakaryocytes break apart, they form more than 1000 platelets each.

Detailed explanation-4: -Platelets are formed when cytoplasmic fragments of megakaryocytes, which are very large cells in the bone marrow, pinch off into the circulation as they age. They are stored in the spleen. Some evidence suggests platelets may also be produced or stored in the lungs, where megakaryocytes are frequently found.

Detailed explanation-5: -Platelets are non-nucleated cell elements that, clearly, result from fractionation of bone marrow megakaryocytes (MKs).

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