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Reproductive System

Male Sexual Response

In the absence of sexual stimulation, the vascular sinusoids in the erectile tissue of the penis contain a small amount of blood and the penis is flaccid (flak’-sid), or soft. Sexual stimulation initiates parasympathetic nerve impulses that cause the dilation of the arterioles and constriction of the

Hormonal Control of Reproduction in Males

The onset of male sexual development begins around the ages of 11 or 12 and is completed by ages 15 to 17. The mechanisms initiating the onset of puberty are not well understood, but the sequence of events is known. Hormones of the hypothalamus, anterior lobe of

Female Reproductive System – Locations and Functions of the Female Reproductive Organs

The female reproductive system produces female sex hormones and female sex cells and transports the sex cells to a site where they may unite with sperm. In addition, the female reproductive system provides a suitable environment for the development of the embryo and fetus and is actively

Hormonal Control of Reproduction in Females – The Ovarian and Menstrual Cycles

Reproduction in females is controlled by hormones produced by the hypothalamus, anterior lobe of the pituitary gland, and ovaries. Female Sex Hormones The ovaries produce the two major groups of female sex hormones-estrogens and progesterone-plus inhibin, which aids estrogens in exerting an inhibitory effect on the anterior

Various Methods of Birth Control Work

Birth control methods may be categorized into several groups based on their mode of action: hormonal, chemical and behavioral contraceptive methods, anti-implantation devices, sterilization, and induced abortion. Contraception Contraception is the prevention of conception, which is the union of sperm nucleus and ovum nucleus. Contraceptive methods are

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