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  1. www.webmd.com › men › 8-things-you-did-not-know-about-your-penis8 Things You Didn't Know About Your Penis - WebMD

    2023年11月15日 · Without regular erections, penile tissue can become less elastic and shrink, making the penis 1-2 centimeters shorter. A device like a vacuum pump, which forces the penis to swell with blood, can...

  2. www.webmd.com › men › what-is-the-average-penis-sizeAverage Penis Size: What Determines It - WebMD

    2024年6月18日 · If you are wondering what the average penis size is at this age, the answer may surprise you. Most men believe that an average penis measures 15.24 centimeters (6.0 inches) or more when erect ...

  3. www.webmd.com › erectile-dysfunction › how-an-erection-occursPenis: Anatomy, Picture, Erection, and Ejaculation - WebMD

    2024年5月17日 · Also known as impotence, erectile dysfunction (ED) is the inability to have or maintain an erection adequate for sex. If you have a penis, you are bound to experience ED at one time or another ...

  4. www.webmd.com › sex › xx-and-xy-chromosomesWhat Are Sex Chromosomes (XX and XY Chromosomes)? - WebMD

    2024年8月29日 · Sex chromosomes are chromosomes, or packages of DNA, that are found inside the nucleus of all of your cells. There are two different kinds: X and Y, which determine whether you’re biologically male...

  5. www.webmd.com › cholesterol-management › high-triglyceridesHigh Triglyceride Levels: Symptoms, Causes, Tests, & ...

    2024年3月22日 · Cholesterol is a waxy compound found in your cells that is carried through your bloodstream via proteins called lipoproteins. Having high levels of HDL is associated with a lower risk of heart...

  6. www.webmd.com › depression › how-different-antidepressants-workHow Antidepressants Work: SSRIs, MAOIs, Tricyclics, and More ...

    2024年8月18日 · What Are Antidepressants? How Antidepressants Work: Understanding the Basics. What Are Reuptake Inhibitors? Cyclic Antidepressants. Serotonin Antagonist and Reuptake Inhibitor (SARIs) Monoamine...

  7. www.webmd.com › a-to-z-guides › what-is-an-antinuclearAntinuclear Antibodies (ANA) Test: Results, Positive vs. ...

    2022年9月2日 · An antinuclear antibody test is a blood test that looks for certain kinds of antibodies in your body. It’s also called an ANA or FANA (fluorescent antinuclear antibody) test. Antibodies are...