What Does the Prostate Do? Function in Semen, Ejaculation and Fertility
Reproductive physiology · Semen biochemistry · Lower urinary tract What Does the Prostate Do? Function in Semen, Ejaculation and Fertility The prostate is best known because it enlarges, becomes inflamed or develops cancer. Its normal job is reproductive: secretory cells manufacture a distinctive fluid, ducts release it into the urethra, and smooth muscle helps propel […]
What Is Prostatic Fluid? Composition, Function and Contribution to Semen
BIOCHEMICAL ATLAS What Is Prostatic Fluid? Composition, Function and Contribution to Semen Prostatic fluid is the secretion released from prostate acini through small ducts into the urethra. It is only one part of seminal plasma. Its unusually high citrate and zinc content, active enzymes and acidic tendency distinguish it from seminal-vesicle fluid and explain how […]
How Does the Prostate Contribute to Ejaculation? Fluid Secretion and Ejaculatory Function
Neurophysiology · Emission · Expulsion How Does the Prostate Contribute to Ejaculation? Fluid Secretion and Ejaculatory Function Ejaculation is not a single squeeze by one organ. It is a coordinated sequence involving the epididymides, vas deferens, seminal vesicles, prostate, bladder neck, urethra and pelvic-floor muscles. The prostate contributes secretion, a conduit through its urethra, and […]
How Does the Prostate Support Fertility? Prostatic Fluid, Sperm Function and Semen
Answer first: The prostate supports fertility by adding enzyme-rich fluid to semen and contracting during emission. Its secretions contain PSA/KLK3, citrate, zinc and other molecules that shape semen’s biochemical environment and help it liquefy after ejaculation. The prostate does not produce sperm—the testes do—and prostate function is only one part of fertility. The clearest model […]
How Does the Prostate Change With Age? Growth, Volume and BPH Risk
AGE–ANATOMY EVIDENCE MAP How Does the Prostate Change With Age? Growth, Volume and BPH Risk The prostate does not simply become “large” at a fixed age. Later-life change is concentrated mainly around the urethra, while total volume, outlet shape, symptoms and obstruction can follow different trajectories. Direct answer: The prostate commonly enlarges with age because […]
What Is a Normal Prostate Size? Volume, Age and Measurement Ranges
REFERENCE-RANGE LAB What Is a Normal Prostate Size? Volume, Age and Measurement Ranges “Normal prostate size” is not one number. It is a reference distribution shaped by age, population, gland zone and measurement method. Direct answer: A healthy young-adult prostate is commonly described as approximately 20–25 mL, with dimensions near 3.75–4.0 cm wide, 2.5–3.0 cm […]
How Is Prostate Volume Measured? Ultrasound, MRI and Volume Calculation
MEASUREMENT LAB · METHOD BEFORE NUMBER How Is Prostate Volume Measured? Ultrasound, MRI and Volume Calculation Prostate volume is not read directly from a scan. It is estimated from a boundary drawn around a three-dimensional gland. Direct answer: Clinicians usually measure prostate width, height and length on ultrasound or MRI, then apply the prolate-ellipsoid formula: […]
BPH vs Benign Prostatic Obstruction: Tissue Growth vs Urinary Blockage
PRESSURE–FLOW LAB · TISSUE ≠ BLOCKAGE BPH vs Benign Prostatic Obstruction: Tissue Growth vs Urinary Blockage BPH describes what prostate tissue is doing. Benign prostatic obstruction describes what the bladder outlet is doing. Direct answer: Benign prostatic hyperplasia (BPH) is benign stromal and epithelial cell proliferation, usually in the transition zone. Benign prostatic obstruction (BPO) […]
Why Does the Prostate Enlarge With Age? BPH Growth and Hormonal Mechanisms
AGEING–GROWTH CONTROL BOARD Why Does the Prostate Enlarge With Age? BPH Growth and Hormonal Mechanisms Age does not activate one prostate-growth switch. It creates years in which several local signals can change the balance among cell production, cell loss and tissue remodeling. Direct answer: The prostate may enlarge with age because androgen-responsive stromal and epithelial […]
Does Prostate Size Predict BPH Symptoms? Volume, Obstruction and LUTS
SIZE–SYMPTOM DISCORDANCE OBSERVATORY Does Prostate Size Predict BPH Symptoms? Volume, Obstruction and LUTS A prostate-volume number and a symptom score describe different dimensions. They can move together across populations while diverging sharply in one person. Direct answer: Prostate size does not reliably predict how severe BPH-associated urinary symptoms will be. A large gland may cause […]