uterers

Question 1

ureters

Answer 1

Ureters are two slender tubes that carry urine from the kidneys to the bladder.

Each is about 25–30 cm (10–12 inches) long and 6 mm (¼ inch) in diameter.

They run behind the peritoneum (the membrane lining the abdominal cavity).

Each ureter starts at the renal pelvis (the funnel-shaped area of the kidney) and ends at the posterior side of the bladder, entering it at a slight angle.

The mucosal lining (inner layer) of the ureter is continuous with:

The renal pelvis (above)

The bladder (below)

Question 2

the ureters peristalis

Answer 2

Function: Ureters carry urine from the kidneys to the bladder.

Not just gravity: While gravity might help a little, it can’t fully transport urine — especially if you’re lying down or even upside down!

Peristalsis does the work:

The smooth muscle in the ureter walls contracts in waves (called peristalsis).

These waves push urine down toward the bladder.

Backflow is prevented:

Once urine enters the bladder, it’s prevented from flowing backward into the ureters by small valve-like folds in the bladder mucosa that cover the ureter openings.

Question 3

kidney stones

Answer 3

What they are:
Kidney stones (renal calculi) are crystals formed from uric acid salts or other solutes that precipitate (solidify) in the renal pelvis when urine becomes too concentrated.

Pain:
They can cause severe pain (radiating to the flank or lower back) when:

The ureter walls contract around the sharp stones during peristalsis

Or if a stone gets stuck in the ureter

Risk factors for stone formation:

Frequent urinary tract infections (UTIs)

Urinary retention (not fully emptying the bladder)

Alkaline urine

Treatment options:

Surgery

Lithotripsy – a noninvasive treatment using ultrasound waves to break the stones into tiny pieces
→ The fragments are then passed in urine, usually without pain.

Question 4

the urethra spchlinter

Answer 4

The urethra is a thin-walled tube that carries urine from the bladder to outside the body.

At the junction between bladder and urethra:

There’s an internal urethral sphincter

Made of smooth muscle

Involuntary (you don’t control it)

Keeps the urethra closed when you’re not urinating

Further down, passing through the pelvic floor:

The external urethral sphincter

Made of skeletal muscle

Voluntarily controlled (you decide when to open it)

Question 5

parts of the males uthura

Answer 5

Male Urethra – Key Facts:
Length: About 20 cm (8 inches)

Divided into 3 regions:

Prostatic urethra – passes through the prostate

Membranous urethra – passes through the pelvic floor muscles

Spongy (penile) urethra – runs through the penis and opens at the tip

Function:

Carries urine and sperm (in semen) — but not at the same time

Part of both the urinary system and reproductive system

Question 6

urethra in women

Answer 6

Female Urethra – Key Facts:
Length: About 3 to 4 cm (or 1½ inches) — much shorter than in males

Location of opening: The external urethral orifice is located just in front of (anterior to) the vaginal opening

Function:

The only function of the female urethra is to carry urine from the bladder to the outside of the body

It is not part of the reproductive system, unlike in males

Question 7

uti

Answer 7

Female Urinary Tract Infection (UTI) Risk Factors & Symptoms:
Anatomy risk:

The female urinary orifice (urethral opening) is very close to the anal opening.

Improper wiping (back to front) can transfer fecal bacteria into the urethra.

Infection spread:

The urethral mucosa is continuous with the rest of the urinary tract, so infections can easily move upward.

This can lead to:

Urethritis (inflammation of the urethra)

Cystitis (bladder inflammation)

Pyelonephritis (kidney inflammation)

Common UTI symptoms:

Dysuria (painful urination)

Urinary urgency and frequency

Fever

Cloudy or blood-tinged urine

If kidneys are affected:

Back pain

Severe headache (sign of systemic infection)