Ch 27: Reproductive System Goals: Identify the structures of the male and female reproductive systems, including the gross and microscopic anatomy of the organs, structures and accessory glands and their basic functions. Explain meiosis, spermatogenesis and oogenesis.
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Identify the structures of the male and female reproductive systems, including the gross and microscopic anatomy of the organs, structures and accessory glands and their basic functions.
Explain meiosis, spermatogenesis and oogenesis.
Discuss the changes that occur in the female reproductive system during pregnancy.
Gonads gametes & hormones
Ducts transport of . . . ?
Glands secrete fluid
Perineal structures = external genitalia
Function: supports and protects testes
Structure: Skin & underlying superficial fascia
Involuntary contraction (cremasteric reflex) in response to ________
Scrotal sac forms 2 separate chambers
special lumen fluid high in sex hormones, K+ and aa
protection from immune attack (due tosperm specific ag)
FSH and Testosterone work via Sertoli cells
Mature sperm has 3 portions:
See fig 27-6
~ 7 m long
Head - superior, receives spermatozoa
Body - distal and inferior
Tail - leads to ductus deferens
1) Monitors and adjusts tubular fluid (stereocilia!)
2) Recycles damaged spermatozoa
3) Stores sperm and facilitates maturation
Rete testis and
Provide for 95% of the seminal fluid
1) Seminal Vesicles
20 - 30% of seminal fluid
Pea size, paired, at base of penis
Produce about 10% of semen
Alkaline mucus - function??
2-5 ml ejaculate
Ejaculation of semen by pelvic floor and penile muscles (Sympathetic division induces peristalsis in tract)
1. sperm - 20 - 100 million sperm/ ml
2. seminal fluid - see above glands
3. enzymes - proteases and seminalplasmin
Root - fixed to ischial ramus
Body with erectile tissues
Glans – enlargement of corpus spongiosum
Prepuce - foreskin – partially covers glans and surrounds external urethral meatus (may be removed in circumcision)
Preputial glands - produce smegma (supports bacterial growth, such as E. coli)