Final answer:
The fluid squeezed out around a cellular clot when blood clots is called serum, which is the component of plasma that remains after coagulation factors have been removed.
Step-by-step explanation:
The fluid that is squeezed out around the cellular clot when blood clots is called serum. Serum is essentially the liquid portion of the blood that remains after the blood has clotted and the clotting factors have been removed. It differs from plasma in that plasma contains all the coagulation factors and antibodies, while serum does not.
When you centrifuge blood at high rotations, the blood cells and platelets are separated to the bottom of a specimen tube, leaving plasma as the upper liquid layer. Serum is obtained from plasma by removing the coagulation factors such as fibrinogen, which is a key factor in blood clotting, transforming into an insoluble protein called fibrin at a wound site and forming a plug.
Blood clotting involves platelets, which are small cell fragments derived from large cells named megakaryocytes. Platelets collect at a wound site along with clotting factors like fibrinogen to form a clot that prevents blood loss and permits healing.