Final answer:
Thrombosis refers to clotting in a blood vessel that has not been broken, and this statement is true. It can decrease blood flow in a large vessel and totally block blood flow in a small vessel.
Step-by-step explanation:
Thrombosis refers to clotting in a blood vessel that has not been broken.
This statement is true.
A thrombus is an aggregation of platelets, erythrocytes, and even WBCs that can form within an intact or slightly damaged blood vessel.
It can decrease blood flow in a large vessel and totally block blood flow in a small vessel.