Platelets (Thrombocytes)- Definition, Structure, Immunity, Functions

Platelets (Thrombocytes)

What are Platelets (Thrombocytes)? Platelets (Thrombocytes) Definition Platelets or thrombocytes are anucleated cells derived from the megakaryocytic cells in the bone marrow that, besides being one of the key players in maintaining hemostasis, are involved in developing non-hemostatic immune functions. Platelets the second most abundant cells in the blood circulation, with the concentration ranging between 150-400 × 109 /L. The …

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Monocytes- Definition, Structure, Immunity, Subsets, Functions

Monocytes

What are Monocytes? Definition of Monocytes Monocytes are cells of the immune system that represent immune effector cells with chemokine receptors and pathogen recognition receptors that circulate through blood or remain localized in lymphoid organs. These cells account for about 5% of the total circulating nucleated cells in human blood and have a half-life of three days. Monocytes are essential …

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Basophils- Definition, Structure, Immunity and Functions

Basophils

What are Basophils? Definition of Basophils Basophils are nonphagocytic granulocytes that are the least common leukocytes occurring in the blood circulation and are critical to the immune response against parasites. Basophils are similar to eosinophils in that these are produced in response to parasitic infections; however, in the absence of parasitic infections, basophils are involved in allergy symptoms. Even though …

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Eosinophils- Definition, Structure, Immunity and Functions

Eosinophils

What are Eosinophils? Definition of Eosinophils Eosinophils are motile phagocytic cells that play an important homeostatic role in providing defense against parasitic infections. Eosinophils are bone marrow-derived granulocytes that remain in the bloodstream for a shorter period of time and mostly reside in tissues. The functions of eosinophils are multifaceted, including antigen presentation, the release of peptides, lipids, and cytokine …

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Buffy Coat- Definition, Preparation, Uses

Buffy Coat

Buffy Coat Definition A buffy coat suspension is a concentrated suspension of leukocytes and platelets that make up a part of the anticoagulated blood sample obtained by the process of density gradient centrifugation. The term buffy coat arose from the fact that the suspension has a color (yellowish beige) that is similar to buff. Buffy coats primarily contain white blood …

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Blood Cells- Definition and Types with Structure and Functions

Blood Cells- Definition and Types with Structure and Functions

Blood Cells Definition Blood cells, also known as hematocytes, hemocytes, or hematopoietic cells, are cells produced mostly in the blood and are synthesized primarily in the red bone marrow. Blood cells make up about 45% of the blood volume, while the rest (55%) is occupied by blood plasma. Blood contains three different types of blood cells, namely, red blood cell …

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