Ch 50: Holt McDougal Modern Biology Chapter 51: Reproductive System

About This Chapter

The Reproductive System chapter of this Holt McDougal Modern Biology textbook companion course helps students learn essential modern biology lessons on the reproductive system. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Reproductive System textbook chapter.

How it works:

  • Identify the lessons in the Holt McDougal Modern Biology Reproductive System chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the reproductive system topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Anatomy and functions of the male reproductive system
  • Functions of the accessory glands of the male reproductive system
  • Testicular anatomy
  • External anatomy of the male reproductive system
  • Sperm's path from the testes to the urethral orifice
  • Internal anatomy of the female reproductive system
  • External anatomy of the female reproductive system
  • Phases of the ovarian cycle
  • Phases and endometrial changes of the uterine cycle
  • Processes of fertilization and zygote formation
  • Early embryonic development
  • Embryo implantation and placenta formation
  • Structure and function of the placenta
  • The amnion, amniotic fluid and the yolk sac
  • Gastrulation and the formation of three germ layers
  • Fetal development during each trimester
  • The role of hormones in labor and delivery

Holt McDougal Modern Biology is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

21 Lessons in Chapter 50: Holt McDougal Modern Biology Chapter 51: Reproductive System
Test your knowledge with a 30-question chapter practice test
Male Reproductive System: Functions, Organs & Anatomy

1. Male Reproductive System: Functions, Organs & Anatomy

The male reproductive system includes various structures and pathways to transport sperm. Learn about the anatomy, organs, and functions of the male reproductive system.

Male Reproductive System: Accessory Gland Functions

2. Male Reproductive System: Accessory Gland Functions

Ninety-five percent of semen is made from secretions from the accessory glands. Learn about the male reproductive system, the difference between sperm and semen, and the functions of the accessory glands (seminal vesicles, prostate, & bulbourethral).

Testicular Anatomy: Structure, Terms & Diagrams

3. Testicular Anatomy: Structure, Terms & Diagrams

The testes are the male reproductive organs where spermatogenesis and hormone production occur. Learn about testicular anatomy, the functions of the testes, what takes place in between the seminiferous tubules, and the importance of the testes in human reproduction.

Male Reproductive System: External Anatomy

4. Male Reproductive System: External Anatomy

The external anatomy of the male reproductive system includes the penis, scrotum, and testes, which are designed to work in unison to impregnate females of the same species. Take a closer look at the structures and functions of the human penis, scrotum, and testes.

Sperm's Journey from the Testes to Urethral Orifice

5. Sperm's Journey from the Testes to Urethral Orifice

Spermatozoa are produced in the testes, beginning a journey that plays an important role in reproduction. Explore the detailed path sperm takes from the testes to the urethral orifice with the end goal of passing on its DNA by fertilizing a female egg.

Female Reproductive System: Internal Anatomy

6. Female Reproductive System: Internal Anatomy

The female reproductive system has multiple structures with specific purposes and functions. Learn about the internal anatomy of the female reproductive system, including the ovaries, cervix, uterine tubes, and uterus.

External Anatomy of the Female Reproductive System

7. External Anatomy of the Female Reproductive System

The external anatomy of the female reproductive system involves six main structures developed from the same tissues that make the male's external genitals. Learn about the skin folds in the vulva and explore the female erectile structures, including the clitoris and vestibular bulbs.

Phases of The Ovarian Cycle: Overview from Puberty to Menopause

8. Phases of The Ovarian Cycle: Overview from Puberty to Menopause

The ovarian cycle functions in phases from puberty to menopause. Explore the two parts of the ovarian cycle, how timing is involved, the puberty and menopause cycles, and the two phases of reproduction.

Follicular Phase of the Ovarian Cycle

9. Follicular Phase of the Ovarian Cycle

During the ovarian cycle, the oocyte, which is the female gamete, grows and matures through different phases, the first of which is the follicular phase. Explore the stages in the follicular phase, including primordial follicle, primary follicle, secondary follicle, tertiary follicle, and ovulation.

Luteal Phase of the Ovarian Cycle

10. Luteal Phase of the Ovarian Cycle

The luteal phase or post-ovulatory phase of the ovarian cycle occurs immediately after the ovaries release an egg. Learn what happens after ovulation occurs and discover when the formation of the corpus luteum takes place.

The Uterine Cycle: Phases and Endometrial Changes

11. The Uterine Cycle: Phases and Endometrial Changes

Hormonal changes trigger the phases the female reproduction system goes through over the course of about 28 days. Explore how the phases and endometrial changes specific to the uterine cycle prepare the female body for the implantation of a fertilized egg.

Fertilization and Zygote Formation: Definition and Processes

12. Fertilization and Zygote Formation: Definition and Processes

Fertilization is a process that occurs when a female's egg and a male's sperm are fused. Learn about the steps of fertilization and zygote formation. Also, understand all the main components to the fertilization process like gametes and oocytes.

Early Embryonic Development: The Morula and Blastula

13. Early Embryonic Development: The Morula and Blastula

Following fertilization, the early stages of mammalian development--including cleavage, morula formation and blastula formation--are unique to mammalian embryos. Learn about key processes in each stage of development and how they differ from those in non-mammalian development.

Embryo Implantation and Placenta Formation

14. Embryo Implantation and Placenta Formation

All mammals begin as fertilized embryos. Learn what happens to a mammalian embryo when it is fertilized, understand how implantation occurs, and explore how the placenta forms.

The Placenta and the Fetus: Structure and Function

15. The Placenta and the Fetus: Structure and Function

Babies must eat but also discharge wastes into the mother's blood, for which the placenta can be considered the interface. Explore the structure and function of the placenta and how it facilitates the transfer of nutrients and waste products between mother and baby.

Amniotic Fluid, The Amnion, and the Yolk Sac

16. Amniotic Fluid, The Amnion, and the Yolk Sac

Living organisms need a support system as they grow from an embryo into a newborn. Learn how amniotic fluid, the amnion, yolk sac, chorion, and allantois function in placental mammals and egg-laying vertebrates to nourish and protect the unborn as they develop.

Gastrulation and the 3 Germ Layers (Ectoderm, Endoderm & Mesoderm)

17. Gastrulation and the 3 Germ Layers (Ectoderm, Endoderm & Mesoderm)

Gastrulation is a process that creates three different germ layers in an early embryo called ectoderm, endoderm, and mesoderm. Learn what this process is and discover how it occurs in the gastrulation of frogs and mammals.

Fetal Development in the First Trimester: Stages & Timeline

18. Fetal Development in the First Trimester: Stages & Timeline

Fetal development in the first trimester occurs in stages with new organs forming about every four weeks. Explore the first trimester timeline and learn about embryogenesis, cell differentiation, organogenesis, and the growth progression of an embryo.

Second Trimester Fetal Development

19. Second Trimester Fetal Development

The second trimester of fetal development includes months four to six as the fetus grows. Review the first trimester and explore how the fetus develops in size, movement, organs, and systems during the second trimester timeline.

Third Trimester Fetal Development

20. Third Trimester Fetal Development

In the last three months of gestation mark periods of rapid growth for fetuses as their organs and senses mature and refine. Explore the third trimester of fetal development: the seventh, eighth and ninth months of pregnancy.

Childbirth: The Role of Hormones in Labor and Delivery

21. Childbirth: The Role of Hormones in Labor and Delivery

During childbirth, hormones relay signals from the fetus to the mother to initiate labor. Learn about the process of labor and delivery (initiation, continuation, and end of labor), the role of hormones in childbirth, and the function of positive feedback loop.

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