Sem Of Platelets
by Scimat
Title
Sem Of Platelets
Artist
Scimat
Medium
Photograph - Photograph
Description
SEM of platelets. Platelets (thrombocytes) are irregularly-shaped, colorless bodies that are present in blood. Their sticky surface lets them, along with other substances, form clots to stop bleeding. When bleeding from a wound suddenly occurs, the platelets gather at the wound and attempt to block the blood flow. The mineral calcium, vitamin K, and a protein called fibrinogen help the platelets form a clot. A clot begins to form when the blood is exposed to air. The platelets sense the presence of air and begin to break apart. They react with the fibrinogen to begin forming fibrin, which resembles tiny threads. The fibrin threads then begin to form a web-like mesh that traps the blood cells within it. This mesh of blood cells hardens as it dries, forming a clot or scab. Enhanced SEM. Image width 9.85 micrometers. Magnification 10,150x if the image is printed 10 cm wide.
Uploaded
April 12th, 2016
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