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Chapter 16 ~ Human Reproduction
Mammalian reproduction, IThe Human Male Testes~ male gonads Contained w/in scrotum due to temp. Seminiferous tubules~ sperm formation (spermatogenesis) Leydig cells~ hormone production Epididymis~ sperm development Vas deferens~ sperm propulsion Seminal vesicles~ semen Prostate gland~ anticoagulant; nutrients, sperm activation Bulbourethral glands~ acid neutralizer – cleanses urethra Penis/urethra~ semen delivery
Mammalian reproduction, IIThe Human Female Ovaries~ female gonads Follicle~ egg capsule Oocyte – immature egg Graafian follicle – contains mature eggs – ovulation (release) Corpus luteum~ hormone secretion Oviduct (fallopian tubes)~ fertilization Uterus/endometrium~ womb/lining – implantation site Cervix/vagina~ sperm receptacle
Spermatogenesis Puberty until death! Seminiferous tubules~ locationPrimordial germ cell (2N)~ differentiate into…. Spermatogonium (2N)~ sperm precursor Repeated mitosis into…. Primary spermatocyte (2N) 1st meiotic division Secondary spermatocyte (1N) 2nd meiotic division Spermatids (1N)~Sertoli cells provide nutrients Sperm cells (1N)
Oogenesis As embryo until menopause... OvariesPrimordial germ cells (2N) Oogonium (2N) Primary oocyte (2N) Between birth & puberty; prophase I of meiosis Puberty; FSH; completes meiosis I Secondary oocyte (1N); polar body Meiosis II; stimulated by fertilization Ovum (1N); 2nd polar body
The female pattern Ovarian/Menstrual cycles~ •Menstrual phase – endometrium sloughs off Proliferative (follicular) phase endometrium repairs and thickens Follicle-stimulating hormone (FSH) – causes primary follicle to grow Ovulation occurs – release of oocyte – triggered by luteinizing hormone (LH) Secretory (luteal) phase – glands release nutrients and lining becomes vascularized
Embryonic & fetal developmentGestation~ pregnancy 1st trimester: organogenesis fetus (week 8; all adult features) HCG (human chorionic gonadotropin) hormone (menstruation override; pregnancy test detection) Parturition~birth Labor~uterine contractions Lactation~prolactin (triggered by parturition) & oxytocin (triggered by nursing) Mammary glands
Lecture #20 Date ________ u Chapter 46 ~ Animal Reproduction.
Lecture Date ________ u Chapter 46 ~ Animal Reproduction.
Lesson 1: Reproductive Systems. Male reproductive system.
Chapter 46 Animal Reproduction. Reproduction Asexual (one parent) fission (ex. Bacteria: parent separates into 2 cells) budding (ex. Hydra: new splits.
Seminal vesicle (behind bladder)
Male Reproductive Anatomy (Front View)
Chapter 48, (page 936-) Reproductive system Csaba Bödör,
Reproductive. Male Anatomy Function-produces sperm (male gamete) Testes- Produce sperm Enclosed by scrotum Located outside of body-(2º C cooler) Muscles.
Chapter 46: Animal Reproduction.
Human Reproductive System
Ch. 27: Reproduction and Embryonic Development
Reproductive Systems Chapter 16.
Figure 41-9 The human male reproductive system
Human Reproductive System. Gametogenesis Occurs in the gonads (ovaries and testes) Meiosis that results in the production of gametes (haploid) from germ.
Reproduction and Development of the Human Reproductive Systems
What you will learn today . . .
1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CHAPTER 17 REPRODUCTIVE SYSTEM.
Reproductive System Ch 19. General Functions of reproductive system. Produce and nurture sex cells Gametes Sperm Eggs Transport them to sites.
Fig Chapter 46 Animal Reproduction.
REPRODUCTIVE SYSTEM. Female Organs/structures Ovaries Uterus Fallopian tubes (oviduct) Vagina Cervix.
Male Structure Male Structure Testes- Testes- Male gonads Male gonads Produce sperm Produce sperm 2, located in scrotum 2, located in scrotum Seminiferous.
Fig Chapter 46 Animal Reproduction. Fig
Reproduction in Humans
Reproduction and Development in Humans
Unit 10 Chapter 38 Reproduction and Development
Organs Hormonal Control
Organismal Development Part 4
Human Reproduction. pubic bone urinary bladder ureter rectum seminal vesicle prostate gland bulbourethral gland vas deferens epididymis testis scrotum.
Where are sperm formed? A. Epidiymis B. Sertoli Cells C. Celly of Leydig D. Seminiferous Tubules.
Reproductive System Nestor T. Hilvano, M.D., M.P.H.
Human Reproduction Spermatogenesis.
The Continuity of Life:
Mammalian Reproduction The Male Pattern or Hormones Involved in Spermatogenesis Testosterone is the major androgen or steroid hormone involved in sperm.
Lab 10: Reproductive System
Chapter 15 Reproductive System.
Bellwork Why do you think sex (exchange of gametes) has evolved? In what conditions do you think organisms would favor asexual versus sexual reproduction,
Animal Reproduction AP Biology Chapters 46.
Animal Reproduction Chapter 46. Reproduction in the Animal Kingdom Sexual Asexual Fission Budding Fragmentation & Regeneration Parthenogenesis.
Reproduction Topics The Human Male Reproductive System The Human Female Reproductive System Sexually Transmitted Infections (STIs)
Human Anatomy and Physiology
Chapter 46 Animal Reproduction.
The Human Reproductive System
Objectives To identify the major anatomical features of the male reproductive system. To identify the major anatomical features of the female reproductive.
Reproductive System. The Male Reproductive System Testes Ducts Glands.
1 Sex and Reproduction. 2 3 Sexual and Asexual Reproduction Sexual reproduction occurs when a new individual is formed through the union of two sex cells.
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