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Lymphocytes are white blood cells ( leukocytes) that provide an immune response that attacks specific kinds of nonself cells and foreign substances (antigens). There are several major classes of lymphocytes:
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T cells (T lymphocytes) originate in the bone marrow but mature in the thymus gland. T cells attack self cells that have been invaded by pathogens, abnormal self cells (such as cancerous cells), or nonself cells (such as those that might be introduced in an organ transplant).
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B cells (B lymphocytes) originate and mature in the bone marrow. When B cells encounter an antigen (a toxin, virus, or bacterium), they produce plasma cells and memory cells. Plasma cells release antibodies that bind to the antigen and inactivate it. Memory cells circulate in the lymph and blood with the capacity to produce additional antigens for future encounters with the same antigen.
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Macrophages are enlarged monocytes (white blood cells) that engulf microbes and cellular debris.
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Reticular cells and their reticular fibers made from collagen and glycoproteins provide a network within which the lymphocytes and other cells reside.
Anatomy and Physiology
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Anatomy and Chemistry Basics
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- Atoms, Molecules, Ions, and Bonds
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- Inorganic Compounds
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- Organic Molecules
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- Chemical Reactions in Metabolic Processes
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- The Cell
- Tissues
- The Integumentary System
- Bones and Skeletal Tissues
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The Skeletal System
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- Hyoid Bone
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- Organization of the Skeleton
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Muscle Tissue
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- The Muscular System
- Nervous Tissue
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The Nervous System
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The Cardiovascular System
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The Immune System and Other Body Defenses
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The Respiratory System
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The Digestive System
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- The Urinary System
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Lymphoid Cells
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- Atoms, Molecules, Ions, and Bonds
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- Inorganic Compounds
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- Epithelial Tissue
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- Introduction to Tissues
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- Thorax
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- Upper Limb
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- Major Skeletal Muscles
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- Neuroglia
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- Myelination
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- Transmission of Nerve Impulses
- Neurons
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- The Synapse
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- Nervous System Terminology
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- The Brain
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- The Ventricles and Cerebrospinal Fluid
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- The Meninges
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- Cranial Nerves
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- The Spinal Cord
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- Reflexes
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- The Autonomic Nervous System
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- The Somatic Senses
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- Hearing
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- Equilibrium
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- Quiz: The Hypothalamus and Pituitary Glands
- Endocrine Organs and Tissues
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- Antagonistic Hormones
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- The Hypothalamus and Pituitary Glands
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- Blood Formation
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- Hemostasis
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- Circulatory Pathways
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- The Heart
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- Cardiac Conduction
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- Electrocardiogram
- The Cardiac Cycle
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- Blood Vessels of the Body
- Lymphatic Vessels
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- Lymphoid Cells
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- Lymphatic Tissues and Organs
- Lymphatic System Components
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- Nonspecific Barriers
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- Nonspecific Defenses
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- Specific Defense (The Immune System)
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- Major Histocompatibility Complex
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- Lymphocytes
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- Antibodies
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- Costimulation
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- Humoral and Cell-Mediated Immune Responses
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- Supplements to the Immune Response
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- Quiz: Structure of the Respiratory System
- Lungs
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- Mechanics of Breathing
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- Function of the Respiratory System
- Lung Volumes and Capacities
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- Structure of the Respiratory System
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- Gas Exchange
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- Gas Transport
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- Control of Respiration
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- Quiz: Structure of the Digestive Tract Wall
- Digestive Enzymes
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- The Mouth
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- Function of the Digestive System
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- Structure of the Digestive Tract Wall
- The Pharynx
- The Esophagus
- Quiz: The Esophagus
- Deglutition (Swallowing)
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- The Stomach
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- The Small Intestine
- Quiz: The Small Intestine
- Large Intestine
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- The Pancreas
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- The Liver and Gallbladder
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- Regulation of Digestion
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- Ureters
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- Urinary Bladder
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- Anatomy of the Kidneys
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- Regulation of Urine Concentration
- Urethra
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- The Male Reproductive System
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- The Female Reproduction System
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- Online Quizzes for CliffsNotes Anatomy and Physiology QuickReview, 2nd Edition
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