By the end of this section you will be able to: Horticulture and related disciplines Horticulture Horticulture is the art and science of the development, sustainable production, marketing, and use of high-value, intensively cultivated food and ornamental plants. The word is…
Anatomy of the Lymphatic and Immune Systems The lymphatic system is a series of vessels, ducts, and trunks that remove interstitial fluid from the tissues and return it the blood. The lymphatics are also used to transport dietary lipids and…
Learning Objectives By the end of this section, you will be able to: The immune responses to transplanted organs and to cancer cells are both important medical issues. With the use of tissue typing and anti-rejection drugs, transplantation of organs…
Learning Objectives By the end of this section, you will be able to: This section is about how the immune system goes wrong. When it goes haywire, and becomes too weak or too strong, it leads to a state of…
Learning Objectives By the end of this section, you will be able to: Now that you understand the development of mature, naïve B cells and T cells, and some of their major functions, how do all of these various cells,…
Learning Objectives By the end of this section, you will be able to: Antibodies were the first component of the adaptive immune response to be characterized by scientists working on the immune system. It was already known that individuals who…
Learning Objectives By the end of this section, you will be able to: Innate immune responses (and early induced responses) are in many cases ineffective at completely controlling pathogen growth. However, they slow pathogen growth and allow time for the…
Learning Objectives By the end of this section, you will be able to: The immune system can be divided into two overlapping mechanisms to destroy pathogens: the innate immune response, which is relatively rapid but nonspecific and thus not always…
Learning Objectives By the end of this section, you will be able to: The immune system is the complex collection of cells and organs that destroys or neutralizes pathogens that would otherwise cause disease or death. The lymphatic system, for most people,…
Figure 21.1 The Worldwide AIDS Epidemic (a) As of 2008, more than 15 percent of adults were infected with HIV in certain African countries. This grim picture had changed little by 2012. (b) In this scanning electron micrograph, HIV virions (green particles) are…