[Biology Class Notes] on Ejaculation Pdf

Ejaculation is the release of semen from the reproductive tract of a male due to an orgasm. It occurs in two stages: firstly, when sperm are moved from the testes and the epididymis to the beginning of the Urethra, a hollow tube runs through the penis that transports sperm or urine. In the second stage, the semen is exploded through the urethra and from the body. The ejaculation process is possible due to nerve impulses received from the penis; it works as a reflex reaction. Once started, it cannot be interrupted. To know how to ejaculate semen is due to the movement of the sperm cells; it has to receive fluids from various internal organs.

It helps in the increase of oxygen and the decrease of acidity fluids. These internal organs are the prostate gland, ejaculatory ducts, seminal vesicles and Cowper glands that supply seminal plasma to the sperm cell. The total volume of the ejaculate averages between 2 and 5 milliliters in a human.

What is the Ejaculatory Duct? 

The ejaculation muscle is formed by the joining of the ampulla of ductus deferens and seminal vesicle. So, where is sperm stored before ejaculation? The vents that open into the urethra halfway through the prostate gland function to mix the sperm stored in the ampulla with fluids secreted by the seminal vesicles and transport these substances to the prone. At the ejaculation procedure, semen passes through the prostate gland, enters the urethra and exits the body. 

What is an Organ?

In a living organism, a group of tissues perform a specific function. Advanced animals have ten organ systems.

• Skeletal 

• Muscular

• Nervous

• Endocrine

• Digestive

• Respiratory

• Reproductive

• Respiratory

• Circulatory

• Excretory

Plants have primary organs like stem, root, and leaf to help in their growth and survival.

What is Orgasm?

Orgasm is the last and final stage of male sperm ejaculation. It is a feeling of intense pleasure and an abrupt increase in pulse rate and blood pressure. The rapid muscles’ spasms, mainly in the genital and anal areas, are felt. There is a change in the pattern of heart rate and blood pressure simultaneously felt. The release of ejaculatory fluid usually accompanies a male orgasm. A Female attains an orgasm for a more extended period than a male. 

Describe Science

Science is a field of study concerned with the physical world and its phenomena, and It covers unbiased observations and systematic experimentation. It can be divided into three categories.

• Physical Sciences- Study of the inorganic world and its principles. It is further divided into astronomy, physics, chemistry and earth sciences.

• Biological- Study of the organic world, and it can be further divided into biology and medicines.

• Social Sciences- It is the study of the social and cultural behaviour of the society. It can be further divided into anthropology and economics.

What is Semen?

Semen is a fluid released from the male reproductive tract, and it contains sperm cells that help in fertilising the female eggs. It also includes fluids that form seminal plasma to keep the sperm cells viable. The male sperm ejaculation initially has 2 to 5 percent of the semen volume. As they move in the body, they keep collecting different fluids by the various tubules and glands of the reproductive system.

What is the Sexual Response Cycle?

The manner of physiologic events during sexual arousal and intercourse is the sexual response cycle. It occurs in four stages, namely excitement, plateau, orgasm and resolution. In the excitement stage, the body prepares for sexual activity by an erection of the penis in the male and moist vagina walls in the female. In the plateau stage, heart rate increases and muscles become tense, glans at the head of the penis swells in the male while the outer vagina shrinks and the clitoris recants. In Orgasm,  ejaculation in humans occurs and from where the sperm is stored before ejaculation is released. For a female in this stage, the Vagina starts contractions. In the resolution stage, a gradual returning phase begins both in male and female. In the male, the penis shrinks back to its standard size, and in the female, the genital parts come back to the normal stage again.