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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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