4 05 Remember the structures of the reproductive

4. 05 Remember the structures of the reproductive system

4. 05 Remember the structures of the reproductive system Essential question • What are the structures of the reproductive system? 4. 05 Remember the Structures of the Reproductive System 2

Structures of the female reproductive system 4. 05 Remember the Structures of the Reproductive System 3

Ovary (female gonad) • Located on either side of the pelvis, lateral to the uterus • About the size of an almond • Each ovary contains thousands of microscopic sacs called graafian follicles • Inside each follicle, an ovum develops Structures of the female reproductive system • Ova (plural of ovum) • The female gamete or reproductive cells (the egg) 4. 05 Remember the Structures of the Reproductive System The ovum is the largest cell in the human body. 4

Structures of the female reproductive system • Except for gametes, every cell in your body has 46 chromosomes. • Gametes (specialized sex cells) have 23 • 22 autosomes (nonsex chromosones) and single sex chromosomes • The 23 from the sperm and 23 from the ova combine to make the 46 5

Fallopian tube • Also known as oviduct or uterine tube • Approximately 4” long • Not attached to the ovaries • Finger like projections at ends - fimbriae Structures of the female reproductive system 4. 05 Remember the Structures of the Reproductive System 6

Uterus • Hollow, thick-walled, pearshaped, highly muscular organ Structures of the female reproductive system • Lies behind the urinary bladder and in front of the rectum • It is divided into 3 sections and has 3 layers 4. 05 Remember the Structures of the Reproductive System 7

Uterus 3 sections of uterus: Structures of the female reproductive system • Fundus • Bulging upper part of the uterus • Body • The body is the middle portion • Cervix • The bottom section that has a narrow opening and extends into the vagina 4. 05 Remember the Structures of the Reproductive System 8

Cervix • The cervix is the bottom section of the uterus that has a narrow opening and extends into the vagina • Approximately one inch long Structures of the female reproductive system 4. 05 Remember the Structures of the Reproductive System 9

Uterus 3 layers of the uterus Structures of the female reproductive system • Perimetrium • Outer layer Perimetrium • Myometrium • Thick smooth muscle middle layer • Endometrium • Inner mucous layer Endometrium 4. 05 Remember the Structures of the Reproductive System 10

Vagina • Smooth muscle with a mucous membrane lining • Approximately 10 centimeters long • Also known as the birth canal Structures of the female reproductive system Hymen • Perforated membrane that may be at or near opening of vagina 4. 05 Remember the Structures of the Reproductive System 11

Vulva • External female genitalia • Contains labia, clitoris, and perineum Structures of the female reproductive system 12

External genitalia Structures of the female reproductive system Labia • Folds of skin that surround the entrance to the vagina • Labia majora – outside fattier folds • Labia minora – inner folds of skin 13

External genitalia Clitoris Structures of the female reproductive system • Erectile tissue • Contains many nerve endings Perineum • Area between the vagina and rectum 4. 05 Remember the Structures of the Reproductive System 14

Mammary glands (breasts) Structures of the female reproductive system • Consists of 15 or 20 milk producing lobes • Areola - Darkened area that surrounds the nipple 15

Structures of the male reproductive system 4. 05 Remember the Structures of the Reproductive System 16

Structures of the male reproductive system Scrotum • External sac of skin that contains the testes 4. 05 Remember the Structures of the Reproductive System 17

Testes (two) Structures of the male reproductive system • Primary reproductive organ in males • About the size of a small egg • Suspended in the sac of the scrotum • / vas deferens Seminiferous tubules • Minute, convoluted tubules in the testes Epididymis • Coiled duct that connects to the testes 4. 05 Remember the Structures of the Reproductive System 18

Structures of the male reproductive system Sperm • The male gamete (sex cell) Smallest cell in the human body. 4. 05 Remember the Structures of the Reproductive System 19

Vas deferens • • Structures of the male reproductive system 45 cm structure connecting epididymis to ejaculatory duct One from each testicle Vas Seminal vesicles • • Small sacs where seminal fluid is stored One on each side Urethra Ejaculatory duct • • Short, narrow duct that starts where the vas deferens and seminal vesicles meet Leads to the urethra 4. 05 Remember the Structures of the Reproductive System 20

Structures of the male reproductive system Vas deferens • • 45 cm structure connecting epididymis to ejaculatory duct One from each testicle Vas Seminal vesicles • • Small sacs where seminal fluid is stored One on each side Ejaculatory duct • • Short, narrow duct that starts where the vas deferens and seminal vesicles meet Leads to the urethra 4. 05 Remember the Structures of the Reproductive System 21

Urethra • • Structures of the male reproductive system Passage way for urine and sperm So - shared between urinary and reproductive systems in men Prostate gland prostate • Urethra Surrounds the urethra at the neck of the bladder Bulbourethral glands • Pea-sized and inferior to the prostate 4. 05 Remember the Structures of the Reproductive System 22

Structures of the male reproductive system Penis • Contains erectile tissue Prepuce (foreskin) • Covers the tip of the penis • Can be removed with circumcision • circumcision video 4. 05 Remember the Structures of the Reproductive System 23

4. 05 Remember the structures of the reproductive system Male Reproductive Structures VIDEO 4. 05 Remember the Structures of the Reproductive System 24

4. 05 Remember the structures of the reproductive system https: //www. youtube. com/watch? v=-XQcn. O 4 i. X_U 4. 05 Remember the Structures of the Reproductive System 25