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REPRODUCTIVE SYSTEM.

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Presentation on theme: "REPRODUCTIVE SYSTEM."— Presentation transcript:

1 REPRODUCTIVE SYSTEM

2 FUNCTION ?

3 MEIOSIS

4

5 DIFFERENCE BETWEEN FORMATION OF SPERM AND EGG ?

6 PROPHASE I SYNAPSIS: HOMOLOGOUS CHROMOSOMES PAIR UP AND INTERTWINE: FORMS TETRADS CROSS OVER COMMON

7 ANAPHASE I HOMOLOGOUS CHROMOSOME PAIRS SEPARATE

8 TELOPHASE I SAME AS MITOSIS WITH REPLICATED PAIRS

9 SECOND MEITOTIC DIVISION
PROPHASE II: SAME AS MITOSIS ANAPHASE II: CENTROMERES SEPARATE RELEASING CHROMATIDS: NOW CHROMOSOMES TELOPHASE II:

10 MALE SYSTEM PRODUCE/MAINTAIN SPERM CELLS TRANSPORT TO FEMALE TRACT
SECRETE MALE SEX HORMONES

11 TESTES 1-2 MONTHS DROP FROM NEAR KIDNEYS TO SCROTUM ?
STIMULATED BY TESTOSTERONE GUBERNACULUM CRYPTORCHIDISM

12 STRUCTURE TUNICA ALBUGINEA
MEDIASTINUM TESTIS: CONNECTIVE TISSUE (SEPTA) DIVIDE TESTIS TO 250 LOBULES LOBULE: 4 SEMINIFEROUS TUBULES UNITE TO RETE TESTIS IN MEDIASTINUM TO EPIDIDYMIS TO DUCTUS DEFERENS SEMINIFEROUS TUBULES: SPECIALIZED STRATIFIED EPITHELIUM SPERMATOGENIC CELLS: ? INTERSTITIAL CELLS: CELLS OF LEYDIG: MALE SEX HORMONES

13 SUSTENACULAR CELLS: SERTOLI CELLS: COLUMNAR; SUPPORT, NOURISH, REGULATE SPERMATAOGENIC CELLS
aboutcancer.com

14 SPERMATOGENESIS MALE EMBRYO: HORMONES ACTIVATE SPERMATOGONIA: MITOSIS FORMS: A CELLS (SAME) B CELLS: PRIMARY SPERMATOCYTE SPERMATOGENESIS WAITS TILL PUBERTY MORE TESTOSTERONE: NEW MITOSIS; MEIOSIS  2 SECONDARY SPERMATOCYTES  SPERMATIDS HOW MANY? DURING SPERMATOGENESIS CELLS MOVE TOWARDS LUMEN BLOOD-TESTIS BARRIER: TIGHT JUNCTIONS OF SUSTENACULAR CELLS WHY? SPERMATOGENSIS OCCURS CONTINUOUSLY

15 SPERM CELLS  LUMEN  RETE TESTIS  EPIDIDYMUS: COLLECT/MATURE

16 SPERM CELL STRUCTURE 0.06 mm ACROMOSOME: ENZYMES TO ENTER EGG
HYALURONIDASE MIDPIECE: MITOCHONDRIA ? TAIL: FLAGELLUM: MICROTUBULES

17 EPIDIDYMIDES 6 METERS LONG
PSEUDOSTRATIFIEDCOLUMNAR, NONMOTILE CILIA SECRETE FLUID WITH GLYCOGEN FOR ? PERISTALTSIS MOVES SPERM THROUGH AS MATURE

18 DUCTUS DEFERENTIA VASA DEFERENTIA/ VAS DEFERENS 45 cm
PSEUDOSTRATIFIED COLUMNAR EPITHELIUM THROUGH INGUINAL CANAL END: DILATES TO AMPULLA JOINS SEMINAL VESSICLE DUCT TO EJACULATORY DUCT TO PROSTATE GLAND TO URETHRA

19 SEMINAL VESICLES CONVOLUTED SAC, 5 cm
GLANDULAR TISSUE LINING: SECRETES SLIGHTLY ALKALINE FLUID WITH FRUCTOSE AND PROSTAGLANDINS PROTECT SPERM AS IT TRAVELS ENERGY STIMULATE CONTRACTIONS OF FEMALE TRACT ?

20

21 PROSTATE GLAND 4 x 3 cm BRANCHED TUBULAR GLANDS SEPARATED BY CONNECTIVE TISSUE SEPTA AND SMOOTH MUSCLE SECRETE INTO URETHRA THIN, MILKY FLUID ALKALINE VS. METABOLIC WASTE OF SPERM & FEMALE TRACT HELPS MOBILIZE SPERM SMOOTH MUSCLE CONTRACTS FOR SECRETION WHEN SEMEN ENTERS

22 BULBOURETHRAL GLANDS/ COWPER’S GLANDS
1 cm URETHRA BELOW PROSTRATE TUBES OF GLANDULAR EPITHELIAL TISSUE SECRETES MUCUS LIKE FLUID WHEN STIMULATION OCCURS FOR SOME LUBRICATION

23 nursingcrib.com

24 SEMEN 2-5 mm 120 MILLION SPERM PER mm
SPERM CELLS; FLUID FROM SEMINAL VESSICLES, PROSTATE GLAND AND BULBOURETHRAL GLAND ALKALINE, PROSTAGLANDINS AND NUTRIENTS CAPACITATION LAST WEEKS IN MALE, CAN ONLY FERTILIZE FOR 1-2 DAYS

25 EXTERNAL REPRODUCTIVE ORGANS
SCROTUM: SUBCUTANEOUS MEMBRANE OF SMOOTH MUSCLE, NO FAT ? 3º COOLER MEDIAL SEPTUM DIVIDES IN TWO

26 PENIS BODY: ERECTILE TISSUE: PAIR OF COPORA CAVERNOSA AND CORPUS SPONGIOSUM TUNICA ALBUGINEA GLANS: EXTERNAL URETHRAL ORIFICE FORESKIN: PREPUCE

27 PARASYMPATHETIC NS RELEASES VASODILATOR N ITRIC ACID
DILATES ARTERIES THIS CONSTRICTS VEINS ? (BLOOD ENTERS AND PRESSURE BUILDS) SYMPATHETIC NS CONTROLS EMISSION (PERISTALSIS) AND EJACULATION ERECTILE TISSUE STIMULATED, SKELETAL MUSCLE CONTRACTS BULBOURETHRAL FLUID FIRST, PROSTATE, SPERM, THEN SEMINAL VESSICLES

28 HORMONAL CONTROL HYPOTHALAMUS  GnRH  GONADOTROPINS: LH/FSH
LH (ICSH IN MALES) : STIMUATES DEVELOPMENT OF INTERSTITIAL CELLS FSH STIMULATES SUSTENACULAR CELLS FSH AND TESTOSTERONE SPERMATOGENESIS SUSTENACULAR CELLS PRODUCE INHIBIN PREVENTS OVERPRODUCTION OF FSH

29 MALE SEX HORMONES ANDROGENS MOSTLY BY INTERSTITIAL CELLS; SOME ?
TESTOSTERONE: STEROID HORMONE; CARRIED BY PLASMA PROTEINS TO RECEPTOR IN PROSTATE, SEMINAL VESSICLES: CHANGED TO DIHYDROTESTOSTERONE TO FUNCTION EXCESS CHANGED BY LIVER AND EXCRETED PRODUCED AROUND BIRTH AND AT PUBERTY

30 TESTOSTERONE ACTION 8 WEEK EMBRYO: PUBERTY:
FORMATION OF MALE GLANDS; TESTICULAR DECENSION LATER PUBERTY: MALE GLANDS GROW AND DEVELOP SECONDARY SEXUAL CHARACTERISTICS: BODY HAIR; ADAM’S APPLE; THICKENING OF SKIN; MUSCULAR GROWTH: SHOULDERS AND WAIST; BONES THICKEN/STRENGTHEN; INCREASED METABOLISM; RELEASE OF ERYTHROPOIETIN;

31 REGULATION OF HORMONES
HYPOTHALAMUS RELEASES GnRH TO ANTERIOR PITUITARY TO RELEASE LH TO INTERSTITIAL CELLS TO RELEASE TESTOSTERONE NEGATIVE FEEDBACK MALE CLIMATERIC: TESTOSTERONE DECREASES

32 FEMALE SYSTEM FOR PRODUCTION AND MATURATION OF EGG
TRANSPORT FOR FERTILIZATION ENVIRONMENT FOR EMBRYONIC DEVELOPMENT BIRTH FEMALE SEX HORMONES

33 PRIMARY SEX ORGANS: OVARIES
3.5 x 2 x 1 cm HELD BY LIGAMENTS: BROAD LIGAMENT; SUSPENSORY LIGAMENT AND OVARIAN LIGAMENT DESCEND TO PELVIC BRIM MEDULLA AND CORTEX MEDULLA: LOOSE CONNECTIVE TISSUE, BLOOD, NERVES, LYMPH, CORTEX: OVARIAN FOLLICLES TUNICA ALBUGINEA

34 OOGENESIS EMBRYO: HAS ALL EGGS, MITOSIS: MORE OOGONIA  PRIMARY OOCYTES PRIMARY OOCYTE COVERED BY FLATTENED EPITHELIAL CELLS= FOLLICULAR CELLS  PRIMORDIAL FOLLICLE; RESTS TILL PUBERTY EMBRYO: SEVERAL MILLION EGGS  BIRTH: 1 MILLION  PUBERTY: 400,000  ~400 RELEASED  A FEW FERTILIZED

35 PUBERTY: A FEW STIMULATED TO GO THROUGH MEIOSIS
UNEVEN CYTOPLASMIC DIVISION = POLAR BODIES IF FERTILIZED, SECONDARY OOCYTE DIVIDES TO FORM LAST POLAR BODY PUBERTY: INCREASED PRODUCTION OF FSH  OVARIES ENLARGE FSH STIMULATES SOME (UP TO 20) PRIMORDIAL OOCYTES TO MATURE, FOLLICULAR CELLS DIVIDE = GRANULOSA CELLS: STRATIFIED EPITHELIUM, ZONA PELLUCIDA (GLYCOPROTINE LAYER) FORMS  PRIMARY FOLLICLE

36 FOLLICULAR CELLS PROLIFERATE: SECONDARY FOLLICLE
OVARIES DEVELOP: INNER VASCULAR LAYER: THECA INTERNA: STEROID SECRETING CELLS OUTER FIBROUS LAYER: THECA EXTERNA: CONNECTIVE TSSUE FOLLICULAR CELLS PROLIFERATE: SECONDARY FOLLICLE 1 WEEK: DOMINANT FOLLICLE FORMS MATURES IN DAYS TO GRAAFIAN FOLLICLE SECONDARY OOCYTE DEVELOPS WITH THICK ZONA PELLUCIDA AND CORONA RADIATA OF FOLLICLE WHICH SUPPLIES NUTRIENTS TO OOCYTE

37 OVULATION: STIMULATED BY LH: CAUSES SWELLING & RUPTURE OF FOLLICLE
PICKED UP BY UTERINE TUBE: MUST BE FERTILIZED SHORTLY

38 INTERNAL ACCESSORY ORGANS
UTERINE TUBES: BROAD LIGAMENT 10 cm x .7 cm INFUNDIBULUM WITH FIMBRIAE

39 UTERUS 7 x 5 cm x 2.5 cm BROAD LIGAMENT COVERS
ROUND LIGAMENT TO PELVIC WALL BODY FUNDUS CERVIX CERVICAL ORIFICE OSTIUM UTERI

40 ENDOMETRIUM MYOMETRIUM PERIMETRIUM
MUCOSAL, COLUMNAR EPITHEILIUM, TUBULAR GLANDS MYOMETRIUM SMOOTH MUSCLE: LONGITUDINAL, CIRCULAR, SPIRAL PERIMETRIUM

41

42 VAGINA 9 cm FIBROMUSCULAR TUBE ALLOWS SPERM IN/ BABY OUT
SURROUNDS CERVIX VAGINAL ORIFICE: HYMEN LAYERS MUCOSAL: STRATIFIED SQUAMOUS, VAGINAL RUGAE, NO MUCOUS GLANDS MUSCULAR: SMOOTH, LONGITUDINAL AND CIRCULAR; THIN STRIATED AT MOUTH ALSO BULBOSPONGIOSUS: CLOSED FIBROUS: DENSE CONNECTIVE TISSUE, ELASTIC FIBERS, CONNECTIONS

43 EXTERNAL ORGANS LABIA MAJORA LABIA MINORA ENCLOSE PROTECT REST
SKIN, ADIPOSE TISSUE, SMOOTH MUSCLE HAIR, SWEAT GLANDS COVERS VAGINAL OPENINGS LABIA MINORA FLATTENED LONGITUDINAL FOLDS INSIDE CONNECTIVE TISSUE, BLOOD VESSELS STRATIFIED SQUAMOUS

44 CLITORIS 2cm, 0.5 cm 2 COLUMNS OF COPORA CAVERNOSA
SENSORY NERVE FIBERS

45 VESTIBULE SPACE WITHIN LABIA MINORA
VESTIBULAR GLANDS/BARTHOLIN’S GLANDS VESTIBULAR BULBS: VASCULAR ERECTILE TISSUE

46 CONTROL OF ORGASM SEXUAL STIMULATION  PARASYMPATHETIC NS  VASODILATOR NITRIC OXIDE  ERECTION STIMULATES VESTIBULAR GLANDS TO RELEASE MUCUS CLITORAL STIMULATION  ORGASM  REFLEXES IN SACRAL AND LUMBAR SPINAL CORD  CONTRACTION OF UTERINE TUBES AND UTERUS ?

47 HORMONAL CONTROL ~10 YEARS: HYPOTHALAMUS  GnRH  ANTERIOR PITUITARY  FSH & LH  OVARIES, ADRENAL CORTEX, PLACENTA RELEASE HORMONES ESTROGEN ESTRADIOL MOSTLY, ESTRONE, ESTRIOL PROGESTERONE PUBERTY: OVARIES RELEASE ESTROGEN: ENLARGEMENT OF OVARIES AND OTHER ORGANS

48 SECONDARY SEXUAL CHARACTERISTICS
DEVELOPMENT OF BREASTS AND MAMMARY GLANDS MORE ADIPOSE TISSUE INCREASES VASCULARIZATION OF SKIN PROGESTERONE: FROM OVARIES: CHANGES IN ENDOMETRIUM LINING, MAMMARY GLANDS, RELEASE OF GONADOTROPINS ANDROGEN: FROM ADRENAL CORTEX: MORE HAIR, DEVELOPMENT OF SKELETON

49 REPRODUCTIVE CYCLE FIRST: MENARCHE
HYPOTHALAMUS  GnRH  ANTERIOR PITUITARY  FSH & LH FSH: MATURATION OF FOLLICLE; GRANULOSA CELLS  ESTROGEN AND SOME PROGESTERONE LH  OVARIAN CELLS  PRECURSOR MOLECULES  ESTROGEN INCREASING ESTROGEN LEVEL  PROLIFERATIVE STAGE: ENDOMETRIUM THICKENS AS FOLLICLE MATURES

50 DAY 14: ANTERIOR PITUITARY RELEASES LH  OVULATION
OLD FOLLICLE/THECA INTERNA  CORPUS LUTEUM: GLANDULAR  PROGESTERONE  DEVELOPS ENDOMETRIUM MORE & UTERINE GLANDS TO SECRETE GLYCOGEN AND LIPIDS: SECRETORY PHASE ?? HIGH ESTROGEN AND PROGESTERONE INHIBIT FSH & LH NO MORE FOLLICLE STIMULATION IF NOT FERTILIZED: CORPUS LUTEUM  CORPUS ALBICANS: ESTROGEN AND PROGESTERONE DECREASE

51 BLOOD VESSELS CONSTRICT/LESS O2/ CELLS SLOUGH OFF: MENSES: DAY 28 FOR 3-5 DAYS
FSH AND LH INCREASE: NEW CYCLE

52 MENOPAUSE LATE 40/EARLY 50 IRREGULAR/MONTHS TO YEARS: ENDS
AGE OF OVARIES: FEW PRIMARY OOCYTES, FOLLICLES DON’T MATURE, NO OVULATION, LESS ESTROGEN EXCEPT FOR ADRENAL ESTROGEN; LESS PROGESTERONE SECONDARY CHARACTERISTICS CHANGE: SHRINK LOSS OF BONE, THINNING OF SKIN 50% NO SYMPTOMS; HOT FLASHES, MIGRAINES, FATIGUE, MUSCLE SORENESS

53 MAMMARY GLANDS 15-20 LOBES; DENSE CONNECTIVE TISSUE AND ADIPOSE TISSUE
ALVEOLAR GLANDS  ALVEOLAR DUCTS  LACTIFEROUS DUCT  NIPPLE SUSPENSORY LIGAMENTS

54 BIRTH CONTROL DETERMINED BY YOUR BELIEFS: WHEN IS THE DEVELOPING FETUS ALIVE? COITUS INTERRUPTUS RHYTHM METHOD MECHANICAL BARRIERS CONDOM: MALE; FEMALE DIAPHRAGM CERVICAL CAP OFTEN WITH SPERMICIDAL JELLY

55 CHEMICAL BARRIER SPERMICIDAL CREAMS, FOAMS, JELLIES, HIGHER FAILURE RATE WHEN USED ALONE COMBINED HORMONE CONTRACEPTIVES ESTROGEN AND PROGESTERONE LIKE CHEMICAL RING: MONTH PLASTIC PATCH PILL MINIPILL DISRUPT FSH AND LH SECRETION USUALLY AROUND 100% INJECTABLE CONTRACEPTION – FOR 3 MONTHS INTRAUTERINE DEVICES SURGICAL METHODS VASECTOMY TUBAL LIGATION

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