1Primary Sex Organs
Testes- produce sperm, secrete sex hormones (androgens)
2Secondary Sex Organs
Spermaic ducts, accesory glands, and penis- deliver sperm
3Secondary Sex Characteristics
Both- pubic hair, axillary gland w/scent glands; Male- muscular physique, facial hair, coarse hair on torso and limbs, deep voice
4When do Testes descend?
2 months before birth
5Undescended testes
Cryptorchidism
6Protusion of part of intestine into scrotum or groin area (congenital or acquired)
Inguinal Hernia
7Scrotum
sac of skin and superfical fascia; divided by septum; hangs outside abdominal cavity
8What is the temperature in the Scrotum?
3*C lower than core temperture- nessacary for sperm production
9what are the two muscles that accomplish the maintaince of temperature in Scrotum?
Cremaster muscle and Dartos muscle
10Two tunics surrounding each testis
Tunica Vaginalis (outer) and Tunica Albuginea (inner fibrous)
11Seminiferous Tubules
highly coiled tubules in testes; spermatogenic cells within and interstitial endocrine cells around in surrounding CT
12Spermatogenic cells produce
sperm
13Interstitial endocrine cells produce
Testosterno
14Epididymis
highly coiled tube or duct; stores and matures sperm
15Blood Supply- to and from?
Testicular arties from aorta supply and Pampinform plexus drains into testicular vein
16Spermatic cord
cordlike structure that passes through inguinal canal to each testis
17The Spermatic cord contains…
ductus (vas) deferens, blood vessels, nerves, lymphatics, muscle and connective tissue
18Inflammation/Infection of epididymis
Epididymitis
19Twisting of Testis
Testicular Torsion (have 6 hrs til testes die)
20Penis
male reproductive organ; delivers sperm into the female reproductive tract
21What is the cuff of loose skin covering the glans of the penis?
Prepuce (foreskin)
22Erectile tissue of penis
ONE corpus spongiosum (around urethra); TWO corpa cavernosa
23Seminal Vesicles (paired glands)
produce viscous, alkanine fluid- compose 60% of semen
24Prostate
produces milky, slightly acid fluid- compose 30% of semen
25Bulbo-urethral glands (paired)
produce thick, clear mucus during sexual arousal
26Semen
milky-white, sticky mixture of sperm (10%) and acessory gland secretions (90%); alkaline pH(7.2- 8.0)- enhances sperm motility
27How much sperm does semen contain?
20-150 million sperm/mL
28Spermatogenesis
series of events in semifniferous tubules that produce male gametes (sperm)
29Anantomy of Sperm cell
Head- nucleus and acrosome; Midpiece- mitochondria; Tail- flagellum
30_______ are supporting cells in seminiferous tubules that form _______ barrier
Sustentocytes; blood-testis barrier
31Spermatogonia (stem cells) undergo ______ and forms…..
Mitosis; Type A daughter cell and Type B daughter cell
32Type B develops into…
primary spermatocyte- undergos meiosis 1- 2 secondary spermatocytes
33Secondary spermatocytes undergo…..
Meiosis 2- 4 spermatids- become sperm (= spermiogenesis)
34Spermiogenesis
maturation of sperm
35Gametes are….
haploid cells (n) and contain only one pair of each chromosome (23)
36Most body cells are…
Diploid cells (2n) and contain 23 homologous pairs of chromosomes (46)
37Describe Meiosis (gamete formation)
2 consective cell divisions following only 1 round of DNA replication and resulting in 4 haploid daughter cells