A type of blood cell that helps prevent bleeding by causing blood clots to form. Also called thrombocytes.
Blood cells that function to prevent blood loss, including the clotting mechanism.
Disk-shaped blood cells that stick to the (microscopically jagged) edges of wounds. The aggregation of platelets at the wound site leads to blood clotting, forming a temporary wound covering. During this blood clotting process, the platelets release platelet-derived growth factor (PDGF) which attracts fibroblasts to the wound area (for subsequent healing process).
Cellular fragments in the blood that assist in blood clotting.
Very small, cell-like structures in the circulation that are involved in blood clotting.
Cell fragments in the blood that aid in blood clotting.
A component of blood essential for normal blood coagulation.
A small blood cell which releases thromboplastin and which multiplies rapidly after an injury, encouraging the coagulation of blood.
A small round disk that plays an important role in blood coagulation.
Blood cell that helps create blood clots.
Small, rod-shaped blood cells that, when meshed together, help form a clot.
Disc-shaped, small cellular element in the blood, essential for blood clotting. Normally 200,000-300,000 platelets are found in 1 cubic centimeter of blood. Also called thrombocyte.
Blood cells that help repair injured blood vessels. Also known as thrombocytes, platelets stop the loss of blood by plugging holes in blood vessels, the first step in the formation of a clot. Coagulation proteins carried in the blood complete the process. Platelets are colorless oval disks with an average life span of 9 to 14 days. Like most blood cells, they form in the bone marrow and then migrate into the blood. Similar to a red blood cell, a platelet cell does not contain a nucleus, so it cannot replicate.
A disk-shaped structure, 1-2 μn in diameter, present in the blood. With Romanovsky stains platelets appear as fragments of pale-blue cytoplasm with a few red granules. They have several functions, all relating to the arrest of bleeding (see blood coagulation). There are normally 150-400 x 10⁹ platelets per liter of blood.
Blood platelets, or thrombocytes, are small spherical bodies in the blood, which play an important part in the process of coagulation. Normally, there are around 300,000 per cubic millimetre of blood. Platelets may be reduced in number in certain diseases or as a side-effect of certain drugs. Such patients, if at risk of bleeding, may be given platelet transfusions.
A round or oval disk, 2 to 4 μm in diameter, found in the blood of vertebrates. Platelets number 130,000 to 400,000/mm3. They are fragments of megakaryocytes, large cells found in the bone marrow.
Contribute to the blood-clotting process, which stops bleeding; platelets are much smaller than red blood cells.
A type of structure found in blood that starts the process of blood clotting.
Tiny disc-shaped cells in the blood that have no hemoglobin but are needed for blood clot formation.
A diminutive, disk-shaped structure present in the blood, platelets play a crucial role in the process of blood clotting. They assume responsibility for forming the initial plug at the site where a blood vessel has experienced rupture.
The tiniest form of blood cell, also referred to as thrombocytes. Platelets have a crucial role in blood clotting. Upon activation, often due to interaction with impaired blood vessel walls, they aggregate at sites of injury, releasing substances that narrow the damaged blood vessels and initiate the clotting process. Insufficient platelets (known as thrombocytopenia) can lead to specific bleeding disorders.
Tiny discs present in the blood play a crucial role in forming blood clots. For every cubic millimeter of blood, there are between 250,000 to 500,000 of these discs, alongside 6,000 to 8,000 white cells and 5 million red cells. These discs are also known as thrombocytes.