The Immune System
Parts of the immune system:
white blood cells
White blood cells are the key players in your immune system. They are made in your bone marrow and are part of the lymphatic system.
antibodies
Antibodies help the body to fight microbes or the toxins they produce.
complement system
The complement system is made up of proteins whose actions complement the work done by antibodies.
lymphatic system
The lymphatic system is a network of delicate tubes throughout the body
spleen
The spleen is a blood-filtering organ that removes microbes and destroys old or damaged red blood cells.
bone marrow
Bone marrow is the spongy tissue found inside your bones. It produces the red blood cells our bodies need to carry oxygen, the white blood cells we use to fight infection
thymus.
The thymus filters and monitors your blood content. It produces the white blood cells called T-lymphocytes
The immune system is a complex network of cells and proteins that defends the body against infection.
Inmunization
Introduces antigens to a person and the body produces antibodies, it saves copies of the antibodies, it is protected if the threat should reappear later in life.
Fever is an immune system response
A rise in body temperature, or fever, can happen with some infections. This is actually an immune system response. A rise in temperature can kill some microbes. Fever also triggers the body's repair process.
every human possesses an immune system that is equipped to protect us
The immune system can be split up into two parts.
the adaptive defense system.
Adapative inmuno response
Humoral
Cellular
T- Cells
CD4
CD8
B- Cells
specif response for specific type of invader
Antibody
Y shaped proteins produced by lymphocytes
They ciculate in blood and lymph
It recognise strange substances in the body and protect the body of any disease
Classes of antibodies
IgM
IgA
IgD
IgG
IgE
innate defense system
External memebers
Skin
Mucous membranes
Body cavities are lined with mucosae
They are acidic, so it inhibits bacterial grow.
Lysozymes destroy bacteria
Microorganismes get stuck in mucus
Common disorders of the immune system
allergic diseases
where the immune system makes an overly strong response to allergens. Allergic diseases are very common. They include allergies to foods, medications or stinging insects
autoimmune diseases
where the immune system mounts a response against normal components of the body. Autoimmune diseases range from common to rare. They include multiple sclerosis, autoimmune thyroid disease, type 1 diabetes, systemic lupus erythematosus, rheumatoid arthritis and systemic vasculitis.
Healthy ways to strengthen your immune system
-Don't smoke.
-Eat a diet high in fruits and vegetables.
-Exercise regularly.
-Maintain a healthy weight.
-If you drink alcohol, drink only in moderation.
-Get adequate sleep.
Internal defenses
antimicrobial proteins
phagocytes
These cells surround and absorb pathogens and break them down and eat them.
lymphocytes
Help the body to remember previous invaders and recognize them if they come back to attack again.