Sexual Reproduction in Humans
This content discusses human sexual reproduction, encompassing the male and female reproductive systems, processes like spermatogenesis and oogenesis, fertilization, and embryonic development. Explore the anatomy of the reproductive organs, ducts, and accessory structures in males and females. Delve into the specifics of the male reproductive system, including the scrotum, testes, epididymis, vas deferens, ejaculatory ducts, urethra, penis, and accessory sex glands. Discover details about the testes' coverings, tunica vaginalis, tunica albuginea, testicular lobules, and seminiferous tubules along with other components like the rete testes, vas deferens, epididymis, ejaculatory ducts, and urethra.
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Presentation Transcript
Sexual Reproduction in Humans Chapter I Reproduction Systems - Ashish Sharma 1
Human sexual reproduction involves Human male reproductive system Human female reproductive system Spermatogenesis Oogenesis Fertilization Embryonic development 2
Human Reproductive system 1.Gonads 2.repd. Ducts 3.Accessory strucs. Secondary reproductive organs Sec. sexual characters Males-prostate gland, seminal vesicles vasa defferentia, penis Females-less muscular, high pitch, lower BMR Females-fallopian tubes,uterus,vagina, mammary glands Males-muscular built ,moustache,hairy coarse skin etc. 3
Human reproductive system Reproductive organs Reproductive ducts Accessory structures Sec. reproductive organs Sec. sexual characters 4
Male Reproductive System Scrotum Testes Epididymes&vasa eff. Vasa defferentia Ejaculatory ducts Urethra Penis Accessory sex glands 5
SCROTUM TESTES Dark pigmented pouch 3 Coverings Internally Divided into2 sacs Testicular lobules Seminiferous tubules Temp 2 deg. less 6
TESTES Coverings Tunica Vaginalis T. Albuginea T.Vasculosa Testicular Lobules (200-300) Seminiferous Tubules 2-3 in each lobule Lined by germinal epith. 8
Testes Rete testes Vasa differentia Network of seminiferous tubules 2 tubules arising from Cauda epididymes Epididymes Stores sperms and secrete nourishment 9
Other parts of male reproductive system Ejaculatory ducts 2 tubes, arising from seminal vesicles , carry sperms & secretions 20 cm long, carries urine and sperms Urethera penis Copulatory organ,conducts urine and sperms 10
Accessory sex glands Seminal vesicles-2 Prostate Gland Cowper s Glands Secretes fluid containing citric acid ,some lipids , few enzymes & bicarbonate ions Mucus Secrete fructose & prostaglandins 11
Human Female Reproductive System Ovaries Fallopian tubes Uterus Vagina External genitalia Mammary glands 12
Parts of Female Reproductive System Shows developing follicles & corpus luteum & corpus albicans Attached to uterus by ovarian ligament Ovaries Outer cortex Covered by Germinal epith. stroma Inner medulla Functions Gametes production Hormone production 13
F A L L O P I A N Within uterine wall Uterine part Fallopian ducts U B E S Lateral to uterine wall Isthmus PARTS Site of fertilization Ampulla T Funnel like, has finger like projections- fimbrie Infundibullum 14
Hollow muscular , pear shaped U T E R U S Between urinary bladder & rectum Fundus Communicates with fallopian tubes Body Parts Harbours embryo Communicates below with vagina Cervix V A G I N A 10 cm long Provides passage for menstrual flow Serves as receptacle for sperms Outer opening vaginal orifice 16
Mons pubis Anterior most portion V U L V A Erectile tissue , homologus to penis Clitoris Outer thick skin folds Labia Majora Labia Minora Inner smaller skin folds Help in lobrication, on either side of vaginal opening Bartholin s Glands Perineum Modified sweat glands Female hormones develop them Nipple, areola, areolar glands(sebaceous glands) lactiferous sinuses(reservoir of milk),fatty tissue MAMMARY GLANDS Parts Prolactin produces milk 17 Oxytocin releases milk
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