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| Sex organ used in sexual intercourse. Unlike the vagina, it also serves as a conduit for urine. |
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| sponge-like regions of erectile tissue which contain most of the blood in the penis during penile erection |
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| The spongy body that runs along the botton of the penis, contains the penile urethra, and enlarges at the tip of the penis to form the glans. |
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| The ridge that separates the glans from the body of the penis. |
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| The sensitive strip of tissue that connects the underside of the penile glands to the shaft. |
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| The base of the penis, which extends into the pelvis. |
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| The body of the penis, which expands as a result of vasocongestion. |
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| The loose skin that covers the penile glans. Also refered to as the prepuce. |
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| Surgical removal of the foreskin of the penis. |
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| An abnormal condition in which the foreskin is so tight that it cannot be withdrawn from the glans. |
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| The pouch of loose skin that contains the testes. |
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| The cord that suspends a testicle within the scrotum and contains a vas deferens, blood vessels, nerves, and the cremaster muscle. |
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| A tube that conducts sperm from the testicle to the ejaculatory duct of the penis. |
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| The muscle that raises and lowers the testicle in response to temperature changes and sexual stimulation. |
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| A cell from which a new organism develops. |
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| A male steroid sex hormone |
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| Cells that lie between the seminiferous tubules and secrete testosterone. |
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Definition
| Another term for interstitial cells. |
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| Secondary sex characteristics |
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Definition
| Traits that distinguish the genders but are not directly involved in reproduction. (Examples: beard, deep voice, and muscle mass) |
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Definition
| Tiny, winding, sperm-producing tubes within the lobes of the testes. |
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| The muscle in the middle layer of the scrotum that contracts and relaxes in response to temperature changes. |
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Definition
| The process by which sperm cells are produced and developed. |
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| An early stage in the development of sperm cells, in which each parent cell has 46 chromosomes, including one X and Y sex chromosome. |
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| Cells formed by the division of spermatocytes. Each spermatid has 23 chromosomes. |
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| A tube that lies against the back wall of each testicle and stores sperm. |
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| Severing of the vas deferens, preventing sperm from reaching the ejacualtory duct. |
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| Small glands that lie behind the bladder and secrete fluids that combine with sperm in the ejaculatory ducts. |
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| A duct formed by the convergence of a vas deferens with a seminal vesicle through which sperm pass through the prostate gland and into the urethra. |
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Definition
| Hairlike projections from cells that beat rhythmically to produce locomotion or currents. |
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| The gland that lies beneath the bladder and secretes prostatic fluid, which gives semen its characteristic odor and texture. |
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Definition
| Structures that lie below the prostate and empty their secretions into the urethra during sexual arousal. |
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Definition
| Another term for Cowper's glands |
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Definition
| The whitish fluid that constitutes the ejaculate, consisting of sperm and secretions from the seminal vesicles, prostate, and Cowper's glands. |
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Definition
| An inflammation of the bladder or urethra |
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Definition
| A condition in which one or two testicles fails to descend from the abdomen into the scrotum. |
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Term
| Benign Prostatic hyperplasia |
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Definition
| Enlargement of the prostate due to hormonal changes of aging and symptomized by urinary frequency, urinary urgency, and difficulty starting the flow of urine. |
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Definition
| Inflammation of the prostate gland. |
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| Enlargement and stiffing of the penis caused by engorgement with blood. |
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| Feelings of dread and foreboding experienced in connection with sexual activity (or any other activity that might be judged by another person). |
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| The thick, triangular bone located near the bottom of the spinal column. |
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| The division of the nervous system that regulates autonomic bodily processes, such as heartbeat, pupil dilation, respiration, and digestion. |
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| The branch of the ANS most active during emotional responses that spend energy, such as fear and anxiety. The sympathetic ANS largely controls ejaculation. |
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| The branch of the ANS most active during processes that restore energy, like digestion. The parasympathetic ANS largely controls erection. |
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Definition
| Excessive curvature of the penis that can make erections painful. |
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| The climax of sexual excitement |
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Definition
| A person with sensory and motor paralysis of the lower half of the body. |
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| The first phase of ejaculation, which involves contractions of the prostate gland, seminal vesicles, and the upper part of the vas deferens. |
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| A sac or dilated part of a tube or canal. |
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Definition
| The small tube that makes up the prostatic part of the urethral tract and that balloons out as muscles close at either end, trapping semen prior to ejaculation. |
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Definition
| The second stage of ejaculation, during which muscles at the base of the penis and elsewhere contract rhythimically, forcefully expelling semen and providing pleasurable sensations. |
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| Ejaculation in which the ejaculate empties into the bladder. |
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Definition
is the sensitive bulbous structure at the distal end of the penis. The glans penis is anatomically homologous to the clitoral glans of the female. It is sometimes fully or partially covered by the foreskin, except in men who have been fully circumcised.
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| Opening of the urethra, situated on the glans |
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Definition
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Proportions of various substances in semen |
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Definition
| 1% sperm, 70% seminal fluid, 30% prostate fluid |
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Amount of sperm per ejaculation |
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Definition
| 150 million to 500 million |
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Amount of sperm produced per year |
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Definition
| 500 million per day...sooo... |
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