Post on 17-Jan-2015
description
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IMPLEMENTED
CURRICULUM
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QUESTIONS
Are the learning activities congruent with the stated objectives?Are the materials and methods appropriate for the objectives set?Does the teacher have the skill to implement the activities or use the strategy?Does the teacher utilize the various ways of doing to complement the learning styles of the students?
QUEST IONS
QUEST ION
Are there activities provided to address individual differences?Do the activities provide maximum learning experiences?Do the activities motivate the learners to do more and harness their potential?Do the activities utilize multiple sensory abilities of the learners?Do the activities address multiple intelligences of the learners?
PARTS OF THE MALE REPRODUCT IVE SYSTEM
EXTERNAL Parts Of THEMALE REPRODUCTIVE
SYSTEM
SkinCovers the gonads and other accessory organs.Regulates the temperature essential for the sperm (3°C)
SCROTUMPARTS OF THE MALE REPRODUCT IVE SYSTEM
Composed of spongy erectie tissuesErectile organ for male.Sperm pathway
PENISPARTS OF THE MALE REPRODUCT IVE SYSTEM
glans penis(head)
Shaft(body)
Corporacavernosa
Corporaspongiosum
located in the scrotum, outside the body cavity.This keeps testicular temperature cooler than the body cavity.
TESTESPARTS OF THE MALE REPRODUCT IVE SYSTEM
Male gonadsseminiferous tubules- form spermLeydig cells (interstitial cells)- produce androgens
TESTESPARTS OF THE MALE REPRODUCT IVE SYSTEM
Septa250-300 lobulesSeminiferous tubules
TESTESPARTS OF THE MALE REPRODUCT IVE SYSTEM
DUCTS
DUCTS
EPIDIDYMISDUCTUS DEFERENS (VAS
DEFERENS)URETHRA (EJACULATORY
DUCT)
DUCTS
Between seminiferous tubules and vas deferens
~6 m longLocated in scrotum
EPIDIDYMIS
DUCTS
Pseudostratified columnar epitheliumWith stereocilia (long microvilli)
Smooth muscleSperm mature and stored
EPIDIDYMIS
DUCTS
From scrotum to pelvisForms ejaculatory duct with seminal vesicle ductEmpties into prostatic urethraThick muscularisPropels sperm during ejaculation
Ductus deferens / Vas deferens
DUCTS
Pseudostratified epitheliumLamina propriaMuscularisInner longitudinalMiddle circularOuter longitudinal
Ductus deferens / Vas deferens
MICROSCOPIC VIEW
DUCTS
Shared with urinary systemProstatic urethraMembranous urethraSpongy (penile) urethra
Sperm pathway
URETHRA / Ejaculatory duct
ACCESSORY GLANDS
Seminal Vesicle
ACCESSORY GLANDS
60% of semenFructose to nourish spermAlso contains asorbic acid, coagulating enzyme, prostaglandin
SEMINAL VESICLE
Seminal Vesicle
ACCESSORY GLANDS
A pair of glands that secrete a liquid component of semen into the vas deferens.
Secretion is alkaline
SEMINAL VESICLE
ACCESSORY GLANDS
Surrounds prostatic urethra30% of semenSupports sperm
PROSTATE GLAND
ACCESSORY GLANDS
Secretion- slightly alkaline fluid that activates the sperm and prevents them from sticking together
citrate, calcium, phosphate ionsclotting enzymesserine protease
PROSTATE GLAND
Bulbourethral gland
ACCESSORY GLANDS
Function- It acts to wash residual urine out of the urethra when ejaculating semen-- raises pH; neutralizes acidity of urine.
paired glands that lie beneath the prostate
Bulbourethral Gland / COWPER’s Gland
Bulbourethral gland
ACCESSORY GLANDS
Secretion- a thick, clear alkaline mucous that drains into the membranous urethra.
pre-ejaculatory fluidmucusacid buffers
Bulbourethral Gland / COWPER’s Gland
SEMINAL FLUID
WHAT is SEMINAL FLUID?
SEMINAL FLU ID
thick, yellowish, and alkaline.It contains mucus, fructose,
a coagulating enzyme, ascorbic acid, and prostaglandins.
WHAT is SEMINAL FLUID?
SEMINAL FLU ID
Sperm (10%) + accessory gland secretions (90%)2 – 5 ml per ejaculate with 50 – 120 million sperm per ml
EJACULATION
What happens at ejaculation?
E JACUL AT ION
propels sperm from the epididymis to the vas deferens. The vas deferens run from the scrotum and behind the urinary bladder.The ejaculatory ducts open into the urethra.
What is ejaculation?E JACUL AT ION
A male usually ejaculates about 2 – 5 mL of semen; each milliliter containing about 50 – 130 million sperm.
What happens during ejaculation?
E JACUL AT ION
Sympathetic activationPeristaltic contraction of smooth muscles in ducts and glands - ejaculationConstriction of arteries blood pressure in erectile bodies
ERECTION
ERECTION
Sexual excitement (parasympathetic) blood flow to erectile bodiesSqueezes veins shut blood pressure in erectile bodies
ERECTION
Erectile tissues
dilation of deep arterylacunae fill with blooderectile tissues expand and hardenpenile veins pinched off
corpora cavernosa (2)corpus spongiosum
Erectile physiology
SPERMATOGENESIS
SPERMATOGENESIS
SPERMATOGENESIS
SPERMATOGENESIS
MATURE SPERM CELL
SPERMATOGENESIS
MATURE SPERM CELL
SEM of sperm in lumen of seminiferous tubule
head
midpiece
tail
acrosome
nucleus
mitochondria
flagellum
SEMINIFEROUS TUBULES
SPERMATOGENESIS
SpermatogoniaOn basal laminaMitosis
Primary spermatocytes1st meiotic division
Secondary spermatocytes2nd meiotic division
SpermatidHaploid 4 from each 1°
spermatocyte
SPERMATOGENESIS
MATURITY AND DEVELOPMENT
SPERMATOGENESIS
• Gonadotropin Releasing Hormone (GnRH)
• Follicle Stimulating Hormone (FSH)
• Interstitial Cell Stimulating Hormone (ICSH=LH)
• Testosterone• Inhibin• ABP
Hormones Involved in Spermatogenesis
SPERMATOGENESIS
300 million sperm/daySpermatogenesis begins at puberty
HORMONES
HORMONES
hypothalamic Gn-RF
anterior pituitary gland
follicle-stimulating hormone luteinizing hormone
testes
sustentacular cells spermatogonia interstitial cells
prepares for spermiogenesis
inhibin secretion
enter spermatogenesis testosterone secretion
development of primary male sex characteristics(before birth)
development of secondary male sex characteristics (beginning at puberty)
1. enlargement of sex organs2. activation of accessory organs3. beginning of sexual behavior4. increased protein anabolism5. required for spermatogenesis and spermiogenesis
negative feedback
negative feedback
HORMONES
Hormonal Control
HypothalamusHypothalamus
GnRH
Anterior PituitaryAnterior Pituitary
FSHICSH
HORMONES
Hormonal Control
Interstitial CellsInterstitial Cells
ICSH
Testosterone
HORMONES
Hormonal Control
Sertoli CellsSertoli Cells
Testosterone
Spermatogenesis
FSH
Inhibin
HORMONES
Hormonal Control
InhibinActs on anterior pituitaryInhibits FSH production
TestosteroneActs on hypothalamusInhibits GnRH production
HORMONES
EFFECTS OF TESTOSTERONE
muscle and bone growthfacial and pubic hair growththickening of vocal cordsgrowth of pharyngeal cartilagehair follicle effectsstimulates sebaceous glandsIncreased BMR
MALE CONTRACEPTION
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CONTRACEPTION
VASECTOMY
CONTRACEPTION
CONDOMSA synthetic rubber that prevents or catches the seminal fluid upon ejaculation during intercourse
THE END
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