What are the 4 microscopic organisms that cause disease?
Viruses
Bacteria
Fungi
Parasites
each attacks in a specific way
Immunity is the
ability to resist infection and disease.
What is involved in the production of immunity?
Cells
Tissues
Lymphatic system
What do nonspecific defenses do?
-* Block or attack any potential infectious organism
-* Cannot distinguish one attack from another
lymphocytes are part of the ___ which means that
Part of the immune response
* Identify, attack, and develop immunity
* To a specific pathogen
What is lymph
A fluid similar to plasma but does not have plasma
proteins
Lymph has high____and low____
sodium
potassium
Which type of blood cells does lymph carry
- white blood cells NOT RBCS
Lymphatic vessels (lymphatics) Function
- carry lymph from peripheral tissues to the venous system
-undirectional
Wht are parts of the lymphatic system
lymphoid tissues
lymphoid organs
Immune system cells
- Monocytes
-Macrophage
-Mast cell
-dendritic cell
-Natural Killer cells - Neutrophils
_Eosinophils
Basophils
_t-cell
B cells
Functions of lymphatic system
- To produce, maintain, and distribute lymphocytes
Lymphocytes are produced in
In lymphoid tissues (e.g., tonsils)
* Lymphoid organs (e.g., spleen, thymus)
* In red bone marrow
when Lymphocytes are distributed
-Detects problems
* Travels into site of injury or infection
Lymphocyte circulation path
From blood to interstitial fluid through capillaries
* Returns to venous blood through the lymphatic vessels
