2.03 Remember the structures of the lymphatic system

What are the structures of the lymphatic system? 2.03 Remember the stuctures of the lymphatic system 2

Structures of the lymphatic system  Lymph fluid 3  Lymph glands  Lymph vessels  Lymph nodes

Structures of the lymphatic system 4 Lymph fluid (aka:interstitial fluid) Clear, straw-colored (resembles plasma) Fills spaces between tissues Carries digested food, oxygen and hormones to the cells. Carries waste away from the cells (carbon dioxide and urea)

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 5 *Lymph vessels *Closely parallel the blood vessels (veins) transport lymph

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 6 *Lymph vessels closely parallel the veins

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 7 Lymph vessels Lacteals Specialized lymph vessels in the small intestines

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 8 Lymph vessels Lymphatic ducts Large lymph vessels *Thoracic duct (the largest lymphatic vessel) *Collects lymph from the left chest, abdomen and lower limbs as pictured Right lymphatic duct Lymph flows only in one direction

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 9 *Lymph nodes tiny, oval-shaped structures thattiny, oval-shaped structures that range in size from a pinhead to an almond; found throughout the body Lymph node

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 10 Lymph nodes Located throughout the body; clusters are found in the armpits and the neck. Why are there so many?

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 11 Tonsils 3 pairs masses of lymphatic tissue 1.Palatine tonsils sides of throat 2.Adenoids upper throat 3.Lingual tonsils back of tongue

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 12 Say “aahhh” Why this is helpful?

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 13 *Spleen (* largest organ of the system) Sac-like mass *Located in the LUQ, below diaphragm Filters blood, stores large amounts of RBC’s.

2.03 Remember the stuctures of the lymphatic system Thymus gland Located above the heart Located above the heart Produces lymphocytes Produces lymphocytes also an endocrine gland, secretes thymosin also an endocrine gland, secretes thymosin 14 Structures of the lymphatic system

2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 15 Thymus gland What is unique about the thymus gland? It is largest during childhood and then after puberty it begins to shrink.

2.03 Remember the structures of the lymphatic system What are the structures of the lymphatic system? 2.03 Remember the stuctures of the lymphatic system 16