Primary functions of the Lymphatic System
1) Returns excess interstitial fluid to the blood. 2) Absorbs fats & fat-soluble vitamins from the digestive system 3) defends against invading microorganisms & disease
The Lymphatic System consists of?
A fluid (lymph), vessels that transport the lymph, & organs that contain lymphoid tissue.
How do lymphatic vessels differ from blood vessels?
Lymphatic vessels only carry fluid away from the tissues.
The smallest lymphatic vessels
The lymph capillaries
Lymph Capillaries are found in all regions of the body except?
Bone marrow, central nervous system & tissues (bc it lacks blood vessels.
Examples of lymphatic organs
lymph nodess, tonsils, spleen & thymus
Lymph nodes are...
small bean shaped structures, less than 2.5 cm in length, widely distrubuted thoughtout the body & are present in the CNS.
Cluster locations of superficial lymph nodes
1. Right lymphatic duct draining into the right subclavian vein
2. Axillary nodes
3. Cistema chyli
4. Inguinal nodes
5. Palatine tonsil
6. Cervical nodes
7. Thoracic duct draining into the left subclavain vein
9. Thoracic duct
Clusters of lymphatic tissue just uder the mucous membranes that line the nose, mouth, and throat (pharynx).
3 groups of tonsils
Pharyngeal tonsils, palatine tonsils & lingual tonsils
is located i the upper left abdominal cavity just beneath the diaphram; posterior to the stomach. The largest lymphatic organ in the body.
The spleen consists of 2 types of tissue called...
white pulp & red pulp
Thymus & its primary function...
is a soft organ with 2 lobes that is located anterior to the ascending aorta and posterior to teh sternum. The primary fuction of the tymus is teh processing and maturation of special lymphocytes called T lymphocytes or T cells.
Lymph are comprised of?
fluid similar to blood plasma. It is dervied from blood plasma as fluids pass through capillary walls at the arterial end.