Immune/Lymphatic System Quiz Flashcards
What are the 4 functions of the spleen?
1) Phagocytosis
2) Storage of blood
3) Immune response
4) Erythropoiesis
Lymph
Fluid in the tissue spaces that carries protein molecules and other substances back to the blood
Lymphatic vessels
Permit only one way movement of the lymph
Lymphatic capillaries
Tiny blind ended tubes distributed in tissue spaces
Lacteals
Located in the intestinal wall, and absorb fat
Right lymphatic duct
Drains lymph into the blood veins form the upper right extremity and right side of the head, neck and upper torso
Thoracic duct
Largest lymphatic vessel, contains the cisterna chyli. Drains lymph from about 3/4 of our body
Cisterna chyli
Enlarged pouch located in the Thoracic duct
Thymus
Lymphoid tissue organ located in the mediastinum (middle sternum)
Weighs about 35-40g and produce T-cells
Thymosins
Secret hormones
Involution
When lymphoid tissue is turned into fat
Lymph nodes
Filter lymph and WBC are produced there
Flow of lymph:
To node via several afferent lymph vessels and drained. More afferent lymph vessels than efferent lymph vessels
Tonsils
Composed of three masses of lymphoid tissue around the openings of the mouth and throat
3 types of tonsils
1) Palatine tonsils
2) Pharyngeal tonsils
3) Lingual tonsils
Spleen
Largest lymphoid organ in the body. Holds 1 pint of blood.
Functions include: phagocytosis of bacteria and old RBC and acts as a blood reservoir
Phagocytosis
When a cell eats bacteria and absorbs it back
3 types ofNonspecific immunity
1) Skin
2) Tears and mucus
3) Inflammation
Immune system
Protects the body from pathological bacteria, foreign tissues cells and cancerous cells. Made up of specialized cells and molecules
Specific immunity
The ability of the body to recognize, respond to, and remember harmful substances or bacteria
Inherited it Inborn immunity
Inherited immunity to certain diseases from birth
Acquired immunity
Natural immunity- exposes to causative age by NOT deliberate
Active- active disease produces immunity
Passive- immunity passes from mother to fetus through the placenta or through breast feeding
Artificial immunity
Exposure to causative agent IS deliberate
Active- vaccination results in immunity
Passive- protective material developed in another individuals immune system and given to previously non immune individuals
What is lymphedema?
The swelling of an arm or leg caused by a blockage in the lymphatic system
