Male accessory sex organs

len Alfred Ajibola - Tue, 06th August, 2019 @ 15:29

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Food Pyramid - Len Academy

The above diagram shows a _____.

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Anything that elicits a physiological response from an organism is termed _____.

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Which of the following molecule is utilized directly as energy in the human body?

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  • B. Carbohydrate

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  • D. Adenosine Mono Phosphate

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Which of the following is not a basic characteristics of life?

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  • E. Nutrition

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The final organisms in a food chain are best referred to as _____.

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The end product of photosynthesis is _____.

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Food web - Len Academy

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Male Accessory Sex Organs:

The male accessory sex glands are very important in the formation of semen. Without their secretions, the released sperm (via ejaculation) may not be able to fertilize the female's ova (egg).

In a previous article, we looked at the penis, scrotum, testes, epididymis, spermatic cord, cremaster muscles and vas deferens (as structures of the male reproductive system).

Please read on the Male Reproductive System (Penis and Parts of the Penis) here.

The male accessory sex glands include:

  1. Seminar vesicles
  2. Prostate Gland
  3. Bulbourethral Glands or Cowper’s Glands
    Please read on the Seminal Vesicles and Bulbourethral Glands as Male Accessory Sex Organs here.

The glands (listed above) are called accessory because they interact with the male sex cells (sperm) just before they are released from the external urethral orifice in the penis. (Think of the external urethral orifice as the opening on the tip of the penis).

Note: The accessory glands are also vital in the normal functioning of sperm cells. Their secretions together with the sperm give rise to semen.

In order to better comprehend the male accessory glands, let's make some quick points on the ejaculatory ducts.

Please read on the Scrotum and its Contents here.


  • Ejaculatory Ducts

Also called the ductus ejaculatorii, they are paired structures formed by the union of the vas deferens or ductus deferens and the duct of the seminal vesicle.

The ejaculatory ducts, which are about 2cm in length functions to convey semen as it travels into the prostate gland; and eventually drains into the urethra.

Notice the ejaculatory ducts in the diagram; (as explained in the above paragraph):

Male Accessory Sex Organs - Len Academy

Blockage of the ejaculatory ducts will result in a clinical condition called Ejaculatory Duct Obstruction.

Note: If both ducts are obstructed, the patient will suffer from either aspermia (an absence of sperm) or azoospermia (low sperm count). The operation carried out to remove the obstructed or blocked ejaculatory ducts is termed transurethral resection.


Now, let's look into the male accessory glands of reproduction.

  • Prostate Gland

Located between the bladder and the penis (and just in front of the rectum) is the prostate gland which is a muscular structure that looks like the size of a walnut. (Please see the diagram below:)

Prostrate Gland - Len Academy

Note: The above diagram will be referenced in the explanations on seminal vesicles and bulbourethral glands; which are the other accessory male organs of reproduction.

It is the function of the prostate gland to secrete a fluid (called prostatic fluid) into the contents of the ejaculatory duct (that is; sperm).

The prostatic fluid (somewhat milky in appearance) is vital for the normal functioning of sperm; in addition to protecting it.

Also attached to the prostate are the seminal vesicles which secrete some additional fluid (called seminal fluid) into the sperm before ejaculation occurs.

The prostatic fluid (slightly acidic) and seminal fluid (alkaline), together with other fluids secreted into the sperm give rise to semen.

Overall, the semen is slightly alkaline; and this helps to counteract the acidity of the vagina, thus protecting the sperm inside the vagina.

For ejaculation to occur in males, the prostate gland must contract, thus pushing the semen into the urethra. During this process of contraction, the opening between the bladder and urethra is obstructed (closed); and for this reason, a male cannot urinate and ejaculate simultaneously (at the same time). Please see the above diagram.

Note: Urine flows from the bladder into the urethra.

As a male advances in age, they become more likely to have some clinical issues with their prostate gland.

Below are two clinical prostate conditions:

1. Prostate Cancer: This is one of the commonest cancers in males. When a patient delays the surgical operation of a prostate cancer, it’s called watchful waiting. It can be treated surgically via the removal of the prostate organ, or by radiation or hormonal therapy.

2. Prostatitis: This is an inflammation of the prostate gland. It is usually treated by using the appropriate antibiotics, as prescribed by the doctor.

Please read on the Type of Drugs and their Side Effects here.

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.

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For a thing to be considered Living, it must possess all the Basic Characteristics of Life. These include:

  1. Movement

  2. Respiration

  3. Nutrition

  4. Irritability or Sensitivity

  5. Growth

  6. Excretion

  7. Reproduction

  8. Death

  9. Adaptation

  10. Competition

Please read the explanations on all the Basic Characteristics of Life here

During strenuous exercises like sprinting or ๐Ÿƒ running, your body may actually work in the shortage of oxygen. During this time, your body owes oxygen (called oxygen debt) and it must be replenished or repayed after the exercise is stopped. This is why you breathe excess of oxygen after you stopped the exercise.

This is the concept of anaerobic respiration

Food Chain - Len Academy

A food Chain is a diagram that shows the relationship between plants and animals within a habitat on the basis of how they rely on each other for food.

Note: Habitat is a place where an organism live. It is of three types:

  • Terrestrial (Land)
  • Aquatic (Water)
  • Arboreal (๐ŸŒฒ Treetops)

You can read on Food Chain here

The term Biology originated from two Greek words. They are:

  • Bios: means life.
  • Logos: means knowledge or to study.

Biology can therefore be defined is the study of life

Anything that has life is generally considered as a living organism (or organism) ๐ŸŒฑ๐Ÿ๐Ÿ“. All living organisms must be able to carry the following activities:

  1. Movement
  2. Respiration
  3. Nutrition
  4. Irritability or Sensitivity
  5. Growth
  6. Excretion
  7. Reproduction
  8. Death
  9. Adaptation
  10. Competition

The above listed points are often regarded as the basic characteristics of life. You can memorize them using the acronym (MR. NIGER DAC).

You can read on the introduction to Biology and the basic characteristics of life here

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Plants manufacture food through a process called photosynthesis.

Please read on photosynthesis here

Note: Plants are the only orgnisms that take away CO2 from the atmosphere