P, V, & Assoc. Flashcards
Define Sexual Reproduction
Production of offspring by making germ cells
Define Fertilization
Male gamete uniting w/ female gamete
Define Gonad
Produces gametes and secretes sex hormones
Define Ducts
Store and transport gametes
Define Accessory Sex Glands
Produce substance to protect gamete and facilitate movement
As supporting structures, what do the penis and uterus assist with?
Delivery of gametes
Organs of the male reproductive system include ? 4
Testes
Ducts
Accessory sex glands
Supporting structures
What are the 6 ducts of the male reproductive system?
Straight Tubules Rete Testis Efferent Ducts Ductus Epidiymis Epididymis Ductus Deferens
What are the 3 accessory sex glands of males?
Seminal vesicles
Prostate
Bulbourethral glands
What are the 2 male supporting structure?
Scrotum
Penis
What is the external ridge of the scrotum?
Where does is start and end?
Raphe
Urethral meatus -> anus
What does the scrotal raphe represent?
Fusion of genital tubercles from embryonic development
Where does the scrotal subcutaneous layer come from during development?
Abdominal structures during embryonic development
What are the 6 layers of the scrotum?
Dartos muscle (smooth) External spermatic fascia Cremaster muscle (skeletal) Internal Spermatic fascia Tunica vaginalis (parietal and visceral)
What are the functions of the Cremaster and Dartos reflexes?
Cremaster- brings testes closer to absorb heat
Dartos- tightens scrotum to reduce heat loss
Where/how do testicles descend into the scrotum during development?
Inguinal canal during month 7 of development
What structure is a part of the scrotum AND a part of the testes?
Tunica vaginalis
Inner most of scrotum
Outter most of testicle
What does the Tunica Vaginalis develop from?
Peritoneum during descent of testes
Where/what does the Tunica Albuginea do?
Internal to T. Vagainalis
Forms septa dividing testes into lobules
What are the functional units of testes?
Lobules
200-300/testis
What are testicle lobules made up of?
Seminiferous tubules
1-3/tubule
What are the 2 types of cells found in seminiferous tubules?
Spermatogenic cells- sperm forming
Sertoli/sustentacular cells- support spermatogenesis
Where is the location of spermatogenesis?
Seminiferous tubules
Begins w/ primordial germ cell differentiating into spermatogonia
When do spermatogonia enter the testes?
What happens to them once they’re there?
5th week of embryonic development
Dormant until puberty