The thymus gland is located in the ____cavity.

Host resistance to infection may be lowered by all of the following except:

A microbial relationship in which one organism lives completely at the expenseof the host is:

An anticoagulant used during vascular surgery that can be reversed with protaminesulfate is:

Hydronephrosis is:

A red blood cell is known as a/an:

The most widely used method for identifying bacteria by dividing them into two groups is:

A bilateral salpingo-oophorectomy is a surgical procedure to:

One of the most important glands in the body, often referred to as the “master gland,” is the:

The long narrow tubes that drain urine from the kidneys to the bladder are called: