Biology is designed for multi-semester biology courses for science majors. It is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand. To meet the needs of today’s instructors and students, some content has been strategically condensed while maintaining the overall scope and coverage of traditional texts for this course. Instructors can customize the book, adapting it to the approach that works best in their classroom. Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand—and apply—key concepts.

By the end of this section, you will be able to:Describe the process of digestionDetail the steps involved in digestion and absorptionDefine eliminationExplain the role of both the small and large intestines in absorption

By the end of this section, you will be able to:Discuss the role of neural regulation in digestive processesExplain how hormones regulate digestion

By the end of this section, you will be able to:Explain the processes of digestion and absorptionCompare and contrast different types of digestive systemsExplain the specialized functions of the organs involved in processing food in the bodyDescribe the ways in which organs work together to digest food and absorb nutrients

By the end of this section, you will be able to:Explain why an animal’s diet should be balanced and meet the needs of the bodyDefine the primary components of foodDescribe the essential nutrients required for cellular function that cannot be synthesized by the animal bodyExplain how energy is produced through diet and digestionDescribe how excess carbohydrates and energy are stored in the body

By the end of this section, you will be able to:Discuss internal and external methods of fertilizationDescribe the methods used by animals for development of offspring during gestationDescribe the anatomical adaptions that occurred in animals to facilitate reproduction

By the end of this section, you will be able to:Discuss how fertilization occursExplain how the embryo forms from the zygoteDiscuss the role of cleavage and gastrulation in animal development

By the end of this chapter, you will be able to:Describe the roles of male and female reproductive hormonesDiscuss the interplay of the ovarian and menstrual cyclesDescribe the process of menopause

By the end of this section, you will be able to:Explain fetal development during the three trimesters of gestationDescribe labor and deliveryCompare the efficacy and duration of various types of contraceptionDiscuss causes of infertility and the therapeutic options available