The thrombi grow by accretion in the direction of the heart.
Thrombi, in some instances, soften in their centers, and are then observed to contain a puslike substance.
Thrombi from dilatation are met with both in dilated arteries and veins.
The danger of this is greatly increased by infection, which breaks down the thrombi in the veins and arteries.
Thrombi are also divided into primitive, or autochthonous, and secondary varieties.
Thrombi from compression are frequently formed in veins, in the vicinity of growing tumors.
Marantic thrombi are those whose origin is attributable to that enfeebled condition of the body known as marasmus.
Thrombi are also characterized by consistency and relative absence of moisture.
Although most emboli are detached portions of thrombi, any foreign body of suitable size may become an embolus.
The cause of this difference in the color of thrombi is to be sought for in their method of origin.