Vasoconstriction
The blood vessel that carries blood to the glomerulus is called the afferent vessel. But the glomerulus is not close ended nad the vessel that leaves it, called the efferent vessel, carries on beside the nephron and collects the components that are reabsorbed.
The opening in the eye which allows light to pass through is called the pupil.
A blockage of a blood vessel is caused by a clot called a thrombus. If that clot breaks free and travels through the blood vessels then it is called a embolus.
Vessel elements are the individual cells that make up the vessel. Vessel elements are in the xylem and are dead when functioning. They function to carry water and minerals upward in the stem and root.
lumen - the central opening within a tube or hollow organ.
It is called the hatchway. If it is a round opening, it is called a scuttle. If it is a square opening it is called a hatch. Depending on the vessel and the location they can be "dogged" open.
dens
Tunica Intima
tunica intima
its called Shinkai no Kodoku
a calendra
Vertebral foramen
blastopore
Lumen
When a blood vessel bursts, the wall of the vessel has an abnormal opening. This opening allows blood to escape the circulation, and may cause a bruise or hematoma.
A bowl-shaped area that forms around a volcano's central vent is called a crater.