Reproductive system

• Sperm cells (also called sperms or spermatozoa) are produced by the testes.
• The male reproductive organs are the testes, epididymis, vas deferens, seminal vesicles, prostate gland, bulbourethral glands, penis, scrotum.
• Germ cells developed from these layers will produce the gametes.
• The ovaries are the female reproductive glands that produce eggs (ova) and secrete hormones.
• Testosterone is secreted by the Leydig cells within the testes to stimulate the production of sperm cells.
• The male reproductive organs include the penis, scrotum, epididymis, vas deferens, seminal vesicles, prostate gland, bulbourethral glands, urethra, and testes.
• The penis is made up of three columns of erectile tissue that fill with blood during sexual stimulation to cause an erection.
• Implantation is when the fertilized egg attaches itself to the lining of the uterus.
• Fertilization is the union of a sperm cell with an ovum (egg).
• The menstrual cycle refers to the monthly changes that occur in a woman's body as she prepares for possible pregnancy.
• The female reproductive organs include the uterus, vagina, cervix, ovaries, fallopian tubes, and mammary glands.
• Stem cells have the ability to differentiate into various types of specialized cells.
• The female reproductive organs produce and nourish embryos until they can survive outside the body.
• The male reproductive organs produce and transport sperm to fertilize eggs.