The immune system defends the body from invading organisms
that may cause disease. One part of the immune system uses barriers to protect
the body from foreign substances. These barriers include the skin and the
mucous membranes, which line all body cavities; and protective chemicals, such
as enzymes in saliva and tears that destroy bacteria.
Another part of the immune system uses lymphocytes,
specialized white blood cells that respond to specific types of foreign invaders.
B lymphocytes produce proteins called antibodies, which circulate in the blood
and attack specific disease-causing organisms. T lymphocytes attack invading
organisms directly.
Tonsils
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
Another part of the immune system uses lymphocytes,
specialized white blood cells that respond to specific types of foreign
invaders. B lymphocytes produce proteins called antibodies, which circulate in
the blood and attack specific disease-causing organisms. T lymphocytes attack
invading organisms directly.
Thymus gland
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
Another part of the immune system
uses lymphocytes, specialized white blood cells that respond to specific types
of foreign invaders. B lymphocytes produce proteins called antibodies, which
circulate in the blood and attack specific disease-causing organisms. T
lymphocytes attack invading organisms directly.
Lymph Nodes
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
Another part of the immune system
uses lymphocytes, specialized white blood cells that respond to specific types
of foreign invaders. B lymphocytes produce proteins called antibodies, which
circulate in the blood and attack specific disease-causing organisms. T
lymphocytes attack invading organisms directly.
Spleen
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
Another part of the immune system
uses lymphocytes, specialized white blood cells that respond to specific types
of foreign invaders. B lymphocytes produce proteins called antibodies, which
circulate in the blood and attack specific disease-causing organisms. T
lymphocytes attack invading organisms directly.
Bone Marrow
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
The immune system defends the body from invading organisms that may cause disease. One part of the immune system uses barriers to protect the body from foreign substances. These barriers include the skin and the mucous membranes, which line all body cavities; and protective chemicals, such as enzymes in saliva and tears that destroy bacteria.
Another part of the immune system
uses lymphocytes, specialized white blood cells that respond to specific types
of foreign invaders. B lymphocytes produce proteins called antibodies, which
circulate in the blood and attack specific disease-causing organisms. T
lymphocytes attack invading organisms directly.
Lymphatic Vessel
Lymphocytes travel throughout the body in the blood, but they often migrate into lymphatic vessels, which are found in all parts of the body except the brain. Lymphocytes travel within these vessels in a pale, fat-laden liquid known as lymph.
Lymphocytes travel throughout the body in the blood, but they often migrate into lymphatic vessels, which are found in all parts of the body except the brain. Lymphocytes travel within these vessels in a pale, fat-laden liquid known as lymph.
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