Fetal Development
Learning Objectives By the end of this section, you will be able to: As you will recall, a developing human is called a fetus from the ninth week of gestation until birth. This 30-week period of development is marked by…
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Embryonic Development
Learning Objectives By the end of this section, you will be able to: Throughout this chapter, we will express embryonic and fetal ages in terms of weeks from fertilization, commonly called conception. The period of time required for full development…
Fertilization
Learning Objectives By the end of this section, you will be able to: Fertilization occurs when a sperm and an oocyte (egg) combine and their nuclei fuse. Because each of these reproductive cells is a haploid cell containing half of the…
Introduction
Figure 28.1 Newborn A single fertilized egg develops over the span of nine months into an infant consisting of trillions of cells and capable of surviving outside the womb. (credit: “Seattleye”) CHAPTER OBJECTIVES After studying this chapter, you will be able to: In…
Chapter Review
Anatomy and Physiology of the Testicular Reproductive System Gametes are the reproductive cells that combine to form offspring. Organs called gonads produce the gametes, along with the hormones that regulate human reproduction. The male gametes are called sperm. Spermatogenesis, the…
Development of the Male and Female Reproductive Systems
Learning Objectives By the end of this section, you will be able to: The development of the reproductive systems begins soon after fertilization of the egg, with primordial gonads beginning to develop approximately one month after conception. Reproductive development continues…
Anatomy and Physiology of the Ovarian Reproductive System
Learning Objectives By the end of this section, you will be able to: The female, or ovarian, reproductive system functions to produce gametes and reproductive hormones, just like the male reproductive system; however, it also has the additional task of…
Anatomy and Physiology of the Testicular Reproductive System
Learning Objectives By the end of this section, you will be able to: People often use the words “female” and “male” to describe two different concepts: our sense of gender identity, and our biological sex as determined by our X/Y…
Introduction
Figure 27.1 Ovulation Following a surge of luteinizing hormone (LH), an oocyte (immature egg cell) will be released into the uterine tube, where it will then be available to be fertilized by sperm. Ovulation marks the end of the follicular phase of the…
Chapter Review
Body Fluids and Fluid Compartments Your body is mostly water. Body fluids are aqueous solutions with differing concentrations of materials, called solutes. An appropriate balance of water and solute concentrations must be maintained to ensure cellular functions. If the cytosol…