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Chapter 25: Reproduction and Human Development

Difficulty Level: At Grade Created by: CK-12
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Reproduction and Human Development


Lesson 25.1: Male Reproductive System

25.1.1 Male Reproductive Structures

  • Penis
  • Testes
  • Epididymis
  • Ducts and Glands
  • Semen

25.1.2 Sexual Development in Males

  • Development Before Birth
  • Puberty and Its Changes
  • Adolescent Growth Spurt

25.1.3 Production and Delivery of Sperm

  • Spermatogenesis
  • Sperm Maturation
  • Ejaculation

Lesson 25.2: Female Reproductive System

25.2.1 Female Reproductive Structures

  • External Structures
  • Vagina
  • Uterus
  • Ovaries
  • Fallopian Tubes
  • Breasts

25.2.2 Sexual Development in Females

  • Development Before Birth
  • Changes of Puberty
  • Adolescent Growth Spurt
  • Menarche

25.2.3 Egg Production

  • Oogenesis
  • Maturation of a Follicle
  • Ovulation and Fertilization

25.2.4 Menstrual Cycle

  • Phases of the Menstrual Cycle
  • Menopause

Lesson 25.3: From Fertilization to Old Age

25.3.1 Cleavage and Implantation

  • Morula and Blastocyst Stages
  • Implantation

25.3.2 Growth and Development of the Embryo

  • Formation of Cell Layers
  • Differentiation of Cells
  • Organ Formation

25.3.3 Growth and Development of the Fetus

25.3.4 Placenta and Related Structures

  • Placenta
  • Amniotic Sac and Fluid

25.3.5 Pregnancy and Childbirth

  • The Mother’s Role
  • Childbirth

25.3.6 From Birth to Adulthood

  • Infancy
  • Childhood
  • Adolescence

25.3.7 Adulthood and Aging

  • Early Adulthood
  • Middle Adulthood
  • Old Age
  • Causes of Aging

25.3.8 KQED: Embryonic Stem Cell Research

Lesson 25.4: Sexually Transmitted Infections

25.4.1 Understanding Sexually Transmitted Infections

  • Pathogens that Cause STIs
  • How STIs Spread
  • Preventing STIs

25.4.2 Bacterial STIs

  • Chlamydia
  • Gonorrhea
  • Syphilis

25.4.3 Viral STIs

  • Genital Herpes
  • Hepatitis B
  • Genital Warts and Cervical Cancer

Pacing the Lessons

Use the Class Periods per Lesson table below as a guide for the time required to teach the lessons of this chapter.

Lesson Number of Class Periods
25.1 The Male Reproductive System 1.5
25.2 The Female Reproductive System 2.0
25.3 From Fertilization to Old Age 2.0
25.4 Sexually Transmitted Infections 1.0
  • Class periods are assumed to be 60 minutes long.

Online Resources

See the following Web sites for appropriate laboratory activities:

1. In this lab, students will learn about human organ systems through the creation of 3-D models and other materials. Tailor the lab to the chapter by having students focus on the male and female reproductive systems. (Lessons 25.1 and 25.2)

2. This lab will allow students to model the spread of a sexually transmitted infection (HIV) through a population of teens. Students will also address ethical issues associated with sexual behavior and the spread of HIV and other STIs. (Lesson 25.4)

These Web sites may also be helpful:

1. The URL below provides questions and reliable Web site links to guide student investigations of fetal development and pregnancy, changes in boys and girls during puberty, and sexually transmitted infections. The Web site is useful for student research projects and additional information on chapter topics.

2. At the Web site below, you or your students can access several online videos and photographs relating to human reproduction and the male and female reproductive systems. The Web site also has a feature that allows you to create a presentation with the photos.

3. This Web site has an informative tutorial on human reproduction, from fertilization through birth.

4. The Web sites below have more information on specific STIs. You may want to share these Web sites with students.

Chapter Outline

Chapter Summary

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