Unit 14 Reproductive System

29 %
71 %
Information about Unit 14 Reproductive System
Health & Medicine

Published on February 18, 2014

Author: nionoveno

Source: slideshare.net

Description

PPT prepared for lecture.

Facebook: h_noveno@hotmail.com Instagram: Nio Noveno I hope you will make good use of my slides. Enjoy learning!  Anatomy h_noveno@hotmail.com 1

THE REPRODUCTIVE SYSTEM • Gonads – primary sex organs – Testes in males – Ovaries in females • Gonads produce gametes (sex cells) and secrete hormones – Sperm – male gametes – Ova (eggs) – female gametes ANATOMY h_noveno@hotmail.com 3

ANATOMY h_noveno@hotmail.com 4

MALE REPRODUCTIVE SYSTEM • Testes • Duct system – Epididymis – Ductus deferens – Urethra ANATOMY h_noveno@hotmail.com 5

ANATOMY h_noveno@hotmail.com 6

Notes • Dysuria: painful urination • Prostatectomy: removal or scraping of the prostate ANATOMY h_noveno@hotmail.com 7

MALE REPRODUCTIVE SYSTEM • Accessory organs – Seminal vesicle – Prostate gland – Bulbourethral gland • External genitalia – Penis – Scrotum ANATOMY h_noveno@hotmail.com 8

ANATOMY h_noveno@hotmail.com 9

ANATOMY h_noveno@hotmail.com 10

TESTES • Coverings of the testes – Tunica albuginea – capsule that surrounds each testis – Septa – extensions of the capsule that extend into the testis and divide it into lobules • Each lobule contains one to four seminiferous tubules – Tightly coiled structures – Function as sperm-forming factories – Empty sperm into the rete testis • Sperm travels through the rete testis to the epididymis • Interstitial cells produce androgens such as testosterone ANATOMY h_noveno@hotmail.com 11

ANATOMY h_noveno@hotmail.com 12

EPIDIDYMIS • Comma-shaped, tightly coiled tube • Found on the superior part of the testis and along the posterior lateral side • Functions to mature and store sperm cells (at least 20 days) • Expels sperm with the contraction of muscles in the epididymis walls to the vas deferens ANATOMY h_noveno@hotmail.com 13

DUCTUS DEFERENS (VAS DEFERENS) • Carries sperm from the epididymis to the ejaculatory duct • Passes through the inguinal canal and over the bladder • Moves sperm by peristalsis • Spermatic cord – ductus deferens, blood vessels, and nerves in a connective tissue sheath ANATOMY h_noveno@hotmail.com 14

ANATOMY h_noveno@hotmail.com 15

DUCTUS DEFERENS (VAS DEFERENS) • Ends in the ejaculatory duct which unites with the urethra • Vasectomy – cutting of the ductus deferens at the level of the testes to prevent transportation of sperm ANATOMY h_noveno@hotmail.com 16

URETHRA • Extends from the base of the urinary bladder to the tip of the penis • Carries both urine and sperm • Sperm enters from the ejaculatory duct • Regions of the urethra – Prostatic urethra –surrounded by prostate – Membranous urethra – from prostatic urethra to penis – Spongy (penile) urethra – runs the length of the penis ANATOMY h_noveno@hotmail.com 17

SEMINAL VESICLES • Located at the base of the bladder • Produces a thick, yellowish secretion (60% of semen) – Fructose (sugar) – Vitamin C – Prostaglandins – Other substances that nourish and activate sperm ANATOMY h_noveno@hotmail.com 18

PROSTATE GLAND • Encircles the upper part of the urethra • Secretes a milky fluid – Helps to activate sperm – Enters the urethra through several small ducts ANATOMY h_noveno@hotmail.com 19

BULBOURETHRAL GLANDS • Pea-sized gland inferior to the prostate • Produces a thick, clear mucus – Cleanses the urethra of acidic urine – Serves as a lubricant during sexual intercourse – Secreted into the penile urethra ANATOMY h_noveno@hotmail.com 20

SEMEN • Mixture of sperm and accessory gland secretions • Advantages of accessory gland secretions – Fructose provides energy for sperm cells – Alkalinity of semen helps neutralize the acidic environment of vagina – Semen inhibits bacterial multiplication – Elements of semen enhance sperm motility ANATOMY h_noveno@hotmail.com 21

EXTERNAL GENITALIA • Scrotum – Divided sac of skin outside the abdomen – Maintains testes at 3°C lower than normal body temperature to protect sperm viability ANATOMY h_noveno@hotmail.com 22

ANATOMY h_noveno@hotmail.com 23

ANATOMY h_noveno@hotmail.com 24

EXTERNAL GENITALIA • Penis – Delivers sperm into the female reproductive tract – Regions of the penis • Shaft • Glans penis (enlarged tip) • Prepuce (foreskin) – Folded cuff of skin around proximal end – Often removed by circumcision – Internally there are three areas of spongy erectile tissue around the urethra ANATOMY h_noveno@hotmail.com 25

ANATOMY h_noveno@hotmail.com 26

ANATOMY h_noveno@hotmail.com 27

ANATOMY OF A MATURE SPERM CELL • The only human flagellated cell • DNA is found in the head ANATOMY h_noveno@hotmail.com 28

ANATOMY h_noveno@hotmail.com 29

ANATOMY h_noveno@hotmail.com 30

FEMALE REPRODUCTIVE SYSTEM • Ovaries • Duct System – Uterine tubes (fallopian tubes) – Uterus – Vagina • External genitalia ANATOMY h_noveno@hotmail.com 31

ANATOMY h_noveno@hotmail.com 32

ANATOMY h_noveno@hotmail.com 33

ANATOMY h_noveno@hotmail.com 34

OVARIES • Composed of ovarian follicles (sac-like structures) • Structure of an ovarian follicle – Oocyte – Follicular cells ANATOMY h_noveno@hotmail.com 35

ANATOMY h_noveno@hotmail.com 36

OVARIAN FOLLICLE STAGES • Primary follicle – contains an immature oocyte • Graafian (vesicular) follicle – growing follicle with a maturing oocyte • Ovulation – when the egg is mature the follicle ruptures – Occurs about every 28 days • The ruptured follicle is transformed into a corpus luteum ANATOMY h_noveno@hotmail.com 37

SUPPORT FOR OVARIES • Suspensory ligaments – secure ovary to lateral walls of the pelvis • Ovarian ligaments – attach to uterus • Broad ligament – a fold of the peritoneum, encloses suspensory ligament ANATOMY h_noveno@hotmail.com 38

ANATOMY h_noveno@hotmail.com 39

UTERINE (FALLOPIAN) TUBES • • • • • Receive the ovulated oocyte Provide a site for fertilization Attaches to the uterus Does not physically attach to the ovary Supported by the broad ligament ANATOMY h_noveno@hotmail.com 40

UTERINE TUBE FUNCTION • Fimbriae – finger-like projections at the distal end that receive the oocyte • Cilia inside the uterine tube slowly move the oocyte towards the uterus (takes 3–4 days) • Fertilization occurs inside the uterine tube ANATOMY h_noveno@hotmail.com 41

ANATOMY h_noveno@hotmail.com 42

26 November 2011 01 - 07 December 2011 12 December 2011 ANATOMY h_noveno@hotmail.com 43

UTERUS • Located between the urinary bladder and rectum • Hollow organ • Functions of the uterus – Receives a fertilized egg – Retains the fertilized egg – Nourishes the fertilized egg ANATOMY h_noveno@hotmail.com 44

SUPPORT FOR THE UTERUS • Broad ligament – attached to the pelvis • Round ligament – anchored interiorly • Uterosacral ligaments – anchored posteriorly ANATOMY h_noveno@hotmail.com 45

ANATOMY h_noveno@hotmail.com 46

REGIONS OF THE UTERUS • Body – main portion • Fundus – area where uterine tube enters • Cervix – narrow outlet that protrudes into the vagina ANATOMY h_noveno@hotmail.com 47

WALLS OF THE UTERUS • Endometrium – Inner layer – Allows for implantation of a fertilized egg – Sloughs off if no pregnancy occurs (menses) • Myometrium – middle layer of smooth muscle • Serous layer – outer visceral peritoneum ANATOMY h_noveno@hotmail.com 48

VAGINA • • • • • Extends from cervix to exterior of body Behind bladder and in front of rectum Serves as the birth canal Receives the penis during sexual intercourse Hymen – partially closes the vagina until it is ruptured ANATOMY h_noveno@hotmail.com 49

ANATOMY h_noveno@hotmail.com 50

ANATOMY h_noveno@hotmail.com 51

EXTERNAL GENITALIA (VULVA) • Mons pubis – Fatty area overlying the pubic symphysis – Covered with pubic hair after puberty • Labia – skin folds – Labia majora – Labia minora ANATOMY h_noveno@hotmail.com 52

ANATOMY h_noveno@hotmail.com 53

EXTERNAL GENITALIA (VULVA) • Vestibule – Enclosed by labia majora – Contains opening of the urethra and the greater vestibular glands (produce mucus) • Clitoris – Contains erectile tissue – Corresponds to the male penis ANATOMY h_noveno@hotmail.com 54

ANATOMY OF MAMMARY GLANDS • Areola – central pigmented area • Nipple – protruding central area of areola • Lobes – internal structures that radiate around nipple • Alveolar glands – clusters of milk producing glands within lobules • Lactiferous ducts – connect alveolar glands to nipple ANATOMY h_noveno@hotmail.com 55

ANATOMY h_noveno@hotmail.com 56

ANATOMY h_noveno@hotmail.com 57

ANATOMY h_noveno@hotmail.com 58

Add a comment

Related presentations

Related pages

Unit Q: Reproductive System - Home - Mitchell High School

Summer 2005 Q.1 Unit Q: Reproductive System Program Area: Health Occupations Education Course Title: Medical Sciences I Number: 7221
Read more

Unit 12: Reproductive System - Weber School District - Blogs

Medical Anatomy and Physiology Unit Twelve – Reproductive System Page 2 Draft Copy 6. Describe the structure and function of the uterine tubes, including
Read more

Toups Anatomy & Physiology - Unit 14 The Reproductive System

crash course biology: the reproductive system. Reproductive system lecture slides (pdf) cba 4 review
Read more

Search › reproductive system chapter 14 | Quizlet

Unit 12: The Reproductive System (Chapter 14) 58 terms By samsutton19963 58 terms Preview ... Biology and Biochemistry Chapter 14 The Reproductive Systems.
Read more

Instructor’s Guide for ICD-9-CM Diagnostic Coding and ...

Unit 10 . Reproductive Systems . Suggested Student Application Activities . ... 14. Genital pain during or after intercourse: dyspareunia. 15.
Read more