Immune system, deseases, lymphatic system

The immune system is the body’s defence network against disease-causing agents such as bacteria, viruses, fungi, parasites, and harmful toxins. It distinguishes the body’s own cells from foreign material and acts to neutralise or destroy threats. Defence operates on two broad levels: an innate response that reacts quickly and generally to any intruder, and an adaptive response that targets specific pathogens and remembers them for the future.

Innate defences include physical barriers like the skin, as well as inflammation and specialised white blood cells that engulf microbes. The adaptive system relies on lymphocytes, a type of white blood cell. Some lymphocytes produce antibodies, proteins that lock onto specific markers on a pathogen and mark it for destruction, while others directly attack infected cells. Once the body has encountered a particular microbe, it can respond faster and more strongly the next time, which is the basis of immunity and of how vaccines work.

The lymphatic system supports immune function by circulating a fluid called lymph and housing many immune cells. Lymph nodes act as filtering stations where pathogens are trapped and immune responses are coordinated, and they often swell during infection. Other lymphatic organs and tissues, including the tonsils, spleen, thymus, and the appendix, contribute to producing, storing, or activating immune cells. Together these structures allow the body to detect infection, mount a response, and recover.

Frequently asked questions

What is the difference between innate and adaptive immunity?: Innate immunity is a fast, general first line of defence, while adaptive immunity targets specific pathogens and remembers them for future encounters.
What do antibodies do?: Antibodies are proteins that bind to specific markers on a pathogen, neutralising it or flagging it for destruction by other immune cells.
Why do lymph nodes swell during illness?: Lymph nodes filter lymph and host immune activity, so they enlarge as immune cells multiply to fight a nearby infection.

Human anatomy:
Anatomy images	General Anatomy
Articulations	Genetics	Senses: Ear
Blood	Immune system	Senses: Eye
Cardiovascular system	Muscular system	Skeletal system
Cells	Nervous system	Skin, hair & nails
Digestive system	Nose, mouth, tongue & throat	Speech
Electrocardiogram	Reproductive system	Tissues
Embryology	Respiratory system	Tooth
Endocrine system	Senses	Urinary system

Immune system

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Anatomy of the immune system anatomical location of the thymus gland, cellular composition of lymphoid follicles, paracortex and medulla, cellular composition of the red and white pulp, process and purpose of lymphocyte recirculation

Antibodies how antibodies are produced by the lymphocytes, Immune system, deseases, lymphatic system

Antibody molecules antibody molecules are wonderful things. These molecules are made of protein - meaning - the molecule is a bunch of different individual amino acids hooked together in a row (a polymer of amino acids). Each antibody molecule has two different polymers hooked together - one of these amino acid polymers is called a heavy chain and the other one is called a light chain

Blood group antigens blood group antigens, ABO blood group system, ABO antigens, The A antigen and the B antigen are derived from a common precursor known as the H antigen (or H substance)

Blood group antigens Blood type is determined, in part, by the ABO blood group antigens present on red blood cells, three types of blood-group antigens: O, A, and B. They differ only slightly in the composition of carbohydrates

Blood, lymph and the immune system blood, lymph and the immune system, ppt file

Carbohydrate metabolism regulation liver enzymes affected by insulin, enzyme dephosphorylation, insulin regulation of glucokinase, enzyme phosphorylation induced by glucagon, epinephrine action to mobilize glycogen, insulin action in (skeletal) muscle

Immune system Fluid Systems of the Body, The Blood System, The Lymph System, Innate Immunity, Surface Barriers or Mucosal Immunity, Normal Flora, Phagocytes

Immune system understanding the immune system. An immune system is a system of biological structures and processes within an organism that protects against disease by identifying and killing pathogens and tumor cells

Immune system: how it works the immune system is a complex of organs--highly specialized cells and even a circulatory system separate from blood vessels--all of which work together to clear infection from the body. The organs of the immune system, positioned throughout the body, are called lymphoid organs. The word "lymph" in Greek means a pure, clear stream--an appropriate description considering its appearance and purpose

Immune system ppt file

Immune system- organs and cells

lymph and immunity lymph nodules are small masses of lymph tissue (up to a millimetre or so in diameter) in which lymphocytes are produced

Lymphatic system the lymphatic system in most animal species is the most important physiological system of combating foreign bodies such as viruses, bacteria, or fungi. The lymphatic system varies from animal to animal, but in humans, it consists macroscopically of: The bone marrow, spleen, thymus gland, lymph nodes, tonsils, appendix, and a few other organs

Lymphatic system how the Lymphatic system works

Lymphatic system ppt file

Lymphatic system atlas

Lymphatic system and immunity ppt file

Lymphocytes lymphocytes are one of the five kinds of white blood cells or leukocytes), circulating in the blood, B lymphocytes (often simply called B cells) and T lymphocytes (likewise called T cells)

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