Gametes

• The male reproductive system consists of the testes, epididymis, vas deferens, seminal vesicles, prostate gland, bulbourethral glands, penis, urethra, and accessory ducts.
• Sperm cells are produced by spermatogenesis in the seminiferous tubules within the testes.
• Testosterone is secreted by Leydig cells to stimulate spermatogenesis.
• Male sexual response includes erection, emission, and ejaculation.
• Ejaculation involves contractions of smooth muscle in the walls of the vas deferens, ejaculatory ducts, and urethra.
• Fertilization occurs when a sperm cell penetrates an egg cell.
• Ejaculation is the expulsion of semen through the urethra during orgasm.
• Emission occurs when the semen is mixed with fluid from the seminal vesicle, prostate gland, and bulbourethral glands.
• Ovum (egg) - A female gamete that develops from an ovary.
• Erection involves relaxation of smooth muscle in the corpus cavernosum, allowing blood flow into the spongy tissue of the penis.
• Contractions push the sperm out through the urethra during orgasm.
• Ovum (egg) - A female gamete that develops from an ovary and contains genetic material.
• The male reproductive system consists of accessory glands that produce fluids involved in fertilization.
• Fallopian tube - The site where fertilization usually takes place.
• Uterus - A muscular organ where embryos grow and develop until birth.