HESI Entrance Practice Exam 2026 – The Comprehensive All-in-One Guide for Exam Success!

The term that describes being closed or obstructed is "occluded." In a medical context, occlusion refers to the blockage or closure of a blood vessel or bodily passage, which can impede the flow of substances like blood or air. This term can be used in diagnosing conditions where there is a disruption in normal function due to an obstruction.

The other choices do not convey this meaning. "Labile" refers to something that is unstable or easily changed, particularly in mood or condition. "Internal" pertains to something within an organism or structure, lacking the connotation of obstruction. "Intact" means something is undamaged or unbroken, which is contrary to the concept of being closed or obstructed. Therefore, "occluded" is the appropriate term to describe a state of obstruction.