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Urinary System

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Urinary System
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Vocabulary

bladder

bladder

Hollow, sac-like organ that stores urine until it is excreted from the body.
Bowman’s capsule

Bowman’s capsule

A cup-like sac at the beginning of the nephron in the kidney; performs the first step in the filtration of blood to form urine.
glomerulus

glomerulus

A network of capillaries at the beginning of the nephron in the kidney; performs the first step of filtering blood.
nephron

nephron

Structural and functional unit of the kidney; filters blood and forms urine.
renal artery

renal artery

The blood vessel that brings blood into the kidneys.
renal tubule

renal tubule

Part of a nephron where some of the filtered substances are reabsorbed and returned to the bloodstream.
ureter

ureter

Muscular, tube-like organ of the urinary system; moves urine by peristalsis from a kidney to the bladder.
urethra

urethra

Muscular, tube-like organ of the urinary system; carries urine out of the body from the bladder; in males, it also carries sperm out of the body.
urinary system

urinary system

Organ system that includes the kidneys and is responsible for filtering waste products and excess water from the blood and excreting them from the body.
urination

urination

Process in which urine leaves the body through a sphincter at the end of the urethra.
urine

urine

Liquid waste product of the body; formed by the kidneys and excreted by the other organs of the urinary system.

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