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Difficulty: MediumHuman Anatomy and Body Systems

Urine is continuously produced by the human body to filter metabolic waste and maintain fluid balance. Place the following anatomical structures in the correct order through which urine travels, from its initial formation in the kidneys to its final excretion from the body.

  1. 1Nephrons (filtration units of the kidney)
  2. 2Ureters (bilateral muscular tubes)
  3. 3Urinary bladder (expandable muscular reservoir)
  4. 4Urethra (terminal excretion canal)

Answer

Nephrons (filtration units of the kidney) → Ureters (bilateral muscular tubes) → Urinary bladder (expandable muscular reservoir) → Urethra (terminal excretion canal)
The biological pathway of excretion starts in the kidneys, where microscopic nephrons produce urine. Urine collects in the renal pelvis and flows through the bilateral ureters to the urinary bladder for temporary containment, before finally being discharged out of the body through the urethra.

Step-by-Step Solution

1
Identify the site of urine formation
Nephrons in the renal cortex and medulla produce urine through filtration, reabsorption, and secretion.
Urine must be generated in the functional units of the kidney before it can enter the transport conduits.
2
Determine the conduit connecting the kidneys to the central storage organ
The ureters carry urine away from each kidney.
Muscular peristaltic contractions in the ureters transport the newly formed urine from the renal pelvis down toward the pelvic cavity.
3
Identify the storage organ
The urinary bladder collects and stores urine.
Urine accumulates in the bladder until stretch receptors trigger the urge to urinate.
4
Identify the final pathway for fluid release
The urethra conducts urine out of the body.
The urethra is the single terminal canal leading from the bladder neck to the external urethral orifice.

Key Concept

Anatomical pathway and flow of urine through the human excretory system
Estimated Time:1m 0s
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Topics

Human Anatomy and Body Systems

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