Male Reproductive System Anatomy and Physiology

Questions and Answers

What are the main components of the male reproductive system?

Testes, scrotum, penis, seminal vesicles, prostate gland, Cowper’s gland, vas deferens, epididymis.

The male reproductive system allows for ejaculation and urination at the same time.

False

What is the function of the scrotum?

To produce testosterone

To support the testes and regulate the temperature for sperm production (correct)

To store urine

To provide lubrication during intercourse

What is the role of Leydig's cells?

Responsible for the production of testosterone. Signup and view all the answers

The _____ carries sperm from the testicle to the urethra.

vas deferens Signup and view all the answers

Match the following parts of the male reproductive system with their functions:

Seminal Vesicles = Secrete fluid that nourishes sperm Prostate Gland = Provides mobility to sperm Cowper's Gland = Neutralizes urine and provides lubrication Epididymis = Stores sperm for maturation Signup and view all the answers

What is the primary function of the prostate gland?

To provide fluid that nourishes and allows greater mobility to the sperm. Signup and view all the answers

Each testis is covered by a fibrous capsule known as the tunica albuginea.

True Signup and view all the answers

What occurs during ejaculation?

The release of sperm along with seminal fluid. Signup and view all the answers

What percentage of semen volume is secreted by the seminal vesicles?

60% Signup and view all the answers

Study Notes

Male Reproductive System Overview

Comprises external and internal reproductive organs which contribute to reproduction and urinary function.
Involves the process of spermatogenesis, or sperm production.

External Reproductive Organs

Penis: External organ essential for sexual pleasure and reproduction; cannot ejaculate and urinate simultaneously.
- Shaft: Main body.
- Glans Penis: Cone-shaped tip, sensitive ridge of tissue; forms the cap.
- Prepuce: Foreskin covering the glans.
Scrotum: Sac of skin that hangs outside the body; houses the testicles.
- Contains paired testicles separated by a midline septum.
- Regulates testes temperature, which should be maintained at 3°C lower than core body temperature for optimal sperm production.

Internal Reproductive Organs

Testes: Located within the scrotum; responsible for sperm production in seminiferous tubules.
- Contained within the tunica vaginalis (a peritoneal extension) and covered by the tunica albuginea (fibrous capsule).
- Divided into lobules (approx. 250), each containing 3-4 seminiferous tubules, which converge into the rete testis for sperm transport.
Spermatic Cord: Connects testicles to the pelvic cavity; includes vas deferens, nerves, and blood vessels.
Cowper’s Gland (Bulbourethral Glands): Small glands below the prostate; secrete clear fluid before ejaculation to neutralize urine acidity and provide lubrication.
Epididymis: Coiled tube where sperm is stored for up to 6 weeks; about 20 feet long (2 for each testicle).
Prostate Gland: Located under the bladder, surrounding the urethra; provides fluid that nourishes and enhances sperm mobility.
Vas Deferens: Long tube (18 inches) carrying sperm from the testicle to the urethra; sectioned during a vasectomy.

Spermatogenesis

Male sperm production begins at puberty and continues throughout life.
Two types of sperm cells: X chromosome (female) and Y chromosome (male); each contains 23 chromosomes.
Ejaculation releases approximately 300-400 million sperm in about a teaspoon of seminal fluid.

Accessory Glands

Seminal Vesicles: Positioned on the posterior wall of the bladder; secrete 60% of semen volume.
- Components:
  - Fructose: Provides energy for sperm.
  - Fibrinogen: Transforms semen into a bolus for effective propulsion.
  - Prostaglandins: Reduce viscosity of cervical mucus, facilitating sperm passage.

Description

This quiz tests your knowledge on the anatomy and physiology of the male reproductive system, including the external and internal organs. You will learn about the process of spermatogenesis and the functions of various glands such as the prostate and seminal vesicles. Prepare to delve into the intricacies of male reproductive health!