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.­­­­­­________________.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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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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