Difference between Thrombus and Embolus

Feature	Thrombus	Embolus
Definition	A thrombus is a firm mass of blood constituents(e.g. platelets,fibrin,and entrapped cellular elements) which developes within a circulatory system.	An embolus is a apart intravascular solid,liquid or gaseous mass that is supported by the body fluid to a site distant from its point of origin.
Source	Always formed from the constituents of streaming blood.	Nearly all emboli represent some part of a removed thrombus,hence the commonly used term thromboembolism.99% embolus are originated from thrombus(Thromboembolism).
Phase	Thrombus is a stationary solid mass that may obstruct blood flow.Attached to the vessel wall of the site of origin.	Freely floating solid/liquid/gaseous mass,not attached to the site of origin.
Location	Localised at the site of origin.	Disruption of certain thrombus causes embolism travel in the circulation and may obstract to a site distant from its point of origin.
Types	Anatomical ·         Cardiac ·         Arterial ·         Venous ·         Capillary Morphological ·         Pale (platelet thrombus) ·         Red (RBC thrombus) ·         Mixed (intermittent layers)	Types of embolus ·         Systemic thromboembolus ·         Fat embolus ·         Air embolus ·         Amniotic fluid embolus
Effect	Ø      Dependent on location and degree of     vascular occlusion.  Ø      availability of collateral blood supply and susceptibility of area of supply to interruption of blood supply.	Ø      Dependent on extent of disruption to the local circulation and susceptibility of the target organ or tissue to such disruption.
Example	Deep venous thrombus	Pulmonary embolus

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