Lymphatic Flashcards
our body’s ‘sewerage system’.
Lymphatic system
Considered as part of both circulatory and immune systems.
Lymphatic system
Plays a role in maintaining homeostasis whether by regulating fluid balance and protecting the body against diseases.
Lymphatic system
Functions of lymphatic system
Maintenance fluid
Lipid absoption
Defense
About ____ of fluid pass from the blood capillaries into the interstitial spaces each day whereas only ____
pass from the interstitial spaces
back to the capillaries
30 liters
27 L
The extra ____ of interstitial fluid
remained in the interstitial spaces.
3 L
The 3L of fluid enters the lymphatic capillaries. Once inside the lymphatic capillaries. This fluid is called as
Lymph
The lymphatic vessels that in the lining of small intestines
is called ___ that absorbs lipids and other substances
lacteals
The lymph passing through this lymphatic vessel
appears white because of its lipid content an is
called
Chyle
are filtered from lymph by the lymph nodes and from blood by the spleen.
Pathogens
capable of destroying pathogens
Lymphocytes
the fluid that flows through the lymphatic
system
Lymph
The average adult produces between ____ each day.
3-4 liters of lymphatic fluid
Carries fluid in one direction from tissues to circulatory system.
Lymphatic capillaries
Tiny closed ended vessel consisting of simple squamous
epithelium.
Lymphatic capillaries
It is more permeable to blood capillaries because it lacks
basement membrane
Lymphatic capillaries
Lymphatic capillaries joins to forms larger
lymphatic
vessels
have a beaded appearance because of one-way valves that are similar to the valves of the veins.
Small lymphatic vessel
Lymphatic vessel empty into the blood at two locations in the body:
- Lymphatic vessels from the upper right limb and right
half of the head, neck and chest form the right lymphatic duct which empties into the right subclavian vein. - Lymphatic vessel from the rest of the body enter the thoracic duct, which empties into the left subclavian vein.
Lymphatic organs
Tonsils
Spleen
Lymph nodes
Thymus
form a protective ring of lymphatic the nasal and oral cavities and the pharynx.
Tonsil
There are three paired of tonsils:
Pharyngeal tonsil
Palatine tonsil
Lingual tonsil
located near the internal opening of the nasal cavity.
Pharyngeal tonsil
located on each side of the posterior opening of the oral cavity
Palatine tonsil
Posterior surface of the tongue
Lingual tonsil
3 superficial aggregations of lymph nodes on each side of the body includes
Inguinal
Axillary
Cervical nodes
filter out harmful substances and waste products.
Lymph nodes
They also contain immune cells called lymphocytes that destroy bacteria and cancer cells.
Lymph nodes
Roughly the size of a clenched fist and
is located in
LUQ
filters blood.
Spleen
Blood reservoir
Spleen
It is a site where lymphocytes are
activated by the antigens present in
the blood resulting in the activation
of the humoral and cell-mediated
immune response.
White pulp (arteries)
plays the iprimary function of filtering the blood, removing the old RBCs, and digesting the hemoglobin.
Red pulp (veins)
the site for maturation of a class lymphocytes called ____ (capable of reacting to pathogen)
T
cells.
Bilobed organ roughly triangular located in the superio
mediastinum.
Thymus
lymphocytes are numerus and form a dark
staining areas called the
Cortex
is a lighter staining central portion
of the lobules with fewer lymphocytes is
Medulla
Ability to resist damage from pathogens, such as microorganisms; harmful toxins released by microorganisms, and internal threats such as cancer cells
Immunity
responsible for much immunity
B and T cells
body recognizes and destroys certain pathogens, but
the response to them is the same each time the body is exposed.
Innate immunity
prevents pathogens and chemicals from
entering the body in 2 ways
Physical barriers
Are molecules responsible for many aspects
of innate immunity.
Chemical mediators
