The male reproductive system is a network of external and internal organs that function to produce, support, transport, and deliver viable 1.________________ for reproduction. Prenatally, the male sex organs are formed under the influence of 2.________________ secreted from the fetal testes; by puberty, the secondary sex organs further develop and become functional. The gonads are called 3.________________ or testicles (singular: testis). Each testis is about 4.________________ cm in size, within scrotum. 5.________________ and 6.________________ muscles move testes in response to hot or cold. 7.________________ is a serous sac partially encloses each testis that develops as outpocketing of peritoneal cavity. Septal extensions of it divide testis into 8.________________ lobes and each lobule contain 1-4 coiled 9.________________ that makes the sperm. Sperm leave testis through 10.________________ which enter epididymis. Begins at puberty, a male can release 11.________________ million sperm a day. There are three (3) stages of spermatogenesis, 12.________________, 13.________________, and 14.________________. The process of spermatogenesis is controlled by two (2) hormones, the 15.________________ and 16.________________.
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male reproductive system
The male reproductive system is a network of external and internal organs that function to produce, support, transport, and deliver viable 1.________________ for reproduction. Prenatally, the male sex organs are formed under the influence of 2.________________ secreted from the fetal testes; by puberty, the secondary sex organs further develop and become functional. The gonads are called 3.________________ or testicles (singular: testis). Each testis is about 4.________________ cm in size, within scrotum. 5.________________ and 6.________________ muscles move testes in response to hot or cold. 7.________________ is a serous sac partially encloses each testis that develops as outpocketing of peritoneal cavity. Septal extensions of it divide testis into 8.________________ lobes and each lobule contain 1-4 coiled 9.________________ that makes the sperm. Sperm leave testis through 10.________________ which enter epididymis. Begins at puberty, a male can release 11.________________ million sperm a day. There are three (3) stages of spermatogenesis, 12.________________, 13.________________, and 14.________________. The process of spermatogenesis is controlled by two (2) hormones, the 15.________________ and 16.________________. Sperm can swim only after they have left the 17.________________.Sperm is surrounded by 18.________________ cell (sustenacular) to prevent escape of unique antigens seen as foreign and these would activate the 19.________________ system. Interstitial or 20.________________ cells secrete androgens, a male hormone into the bold to sustain all male sex characteristic and sex organs. Sperm leave testis through 21.________________ lined by simple columnar epithelium. Cilia and 22.________________ muscle in wall help move sperm along. Sperm mature in epididymis in 23.________________ days. Sperm gain the ability to 24.________________ and can be stored in 25.________________ for several months. Sperm are ejaculated form epididymis and not directly form the testes. 26.________________ stores and transports sperm during ejaculation. Runs superiorly from scrotum within 27.________________, through inguinal canal and enters 28.________________. Seminal vesicles secrete fluids and substances which constitute 29.________________ percent of semen. Sperm and seminal fluid mix is formed 30.________________ in an ejaculatory duct. A sperm can live in a normal environment to 31.________________ hours. The average of 32.________________ days for the sperms to become fully matured inside the epididymis. Bulbourethral glands secrete33.________________ during sexual excitement and ejaculation. The three part of a penis are 34.________________, 35.________________, and 36.________________. 37.________________ is the loose skin of penis and removed if circumcision. 38.________________ and 39.________________ are the erectile bodies where parasympathetic stimulation during sexual excitation causes engorgement with 40.________________ allowing erection. Ejaculation is caused by 41.________________ nerves that contract the smooth muscle of ducts and penis.
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