This system serves to produce sperm and introduce them into the female body.

This is a pendulous pouch of skin, muscle, and fibrous connective tissue, containing the testes

This is a controversial concept, not accepted by all authorities that defines a period of declining reproductive function that becomes noticeable, if at all, typically in the early 50s.

This is the process of sperm production. It occurs in the seminiferous tubules

Sexual intercourse is also known as this

These are organs other than gonads that are necessary for reproduction

These two organs constitute the external genitalia of the male and occupy the perineum

GnRH stimulates cells called gonadotropes to secrete these two hormones

In this process, each double-stranded chromosome divides into two single-stranded ones, but each daughter cell still has 46 chromosomes

This branch of the penile artery, travels dorsally along the penis not far beneath the skin supplying blood to the skin, fascia, and corpus spongiosum.

This is the most common site of herniation in boys and men

This is a site of sperm maturation and storage

What hormone does the hypothalamus produce to aid in puberty

This is the name of the first stem cells specifically destined to become sperm

This phase is characterized by myotonia and increases in heart rate, blood pressure, and pulmonary ventilation

About 3% of boys are born with undescended testes, also known as this

One of the three pairs of accessory glands, this surrounds the urethra and ejaculatory ducts immediately inferior to the urinary bladder

This hormone stimulates the sustentacular cells to secrete a protein called androgen binding protein which binds testosterone and accumulates it in the lumen of the seminiferous tubules and epididymis.

This part of the spermatozoon fills most of the head and contains a haploid set of condensed, genetically inactive chromosomes

This is short but intense reaction that lasts 3 to 15 seconds and usually is marked by the discharge of semen.

During this week, the descent of the testes begins

This is a muscular tube about 45 cm long and 2.5 mm in diameter. It passes upward through the spermatic cord and inguinal canal and enters the pelvic cavity.

This hormone stimulates the interstitial cells of the testes to secrete androgens, mainly testosterone.

This produces a thin, milky white fluid containing calcium, citrate, and phosphate ions

During the resolution phase, this is the process of the penis becoming soft and flaccid again