Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Results 1 - 2 of 2 for Clump
  1. Blood Clots and Pregnancy Video (March of Dimes Foundation)  
    ... also called a thrombosis) is a mass or clump of blood that forms when blood changes from ...
  2. How Does Blood Clot? Video From the National Institutes of Health (National Heart, Lung, and Blood Institute)  
    ... them to attach to the vessel wall and clump together into a plug. The blood clot forms. ...