Exam Review Flashcards
What are the comments of the lymphatic system
Lymph nodes , vessels and lymph
What are the major areas of lymph nodes in the body?
Axillary, cervical and inguinal
Describe the general anatomy of lymph node
Afferent pathway is located at the convex surface and efferent exit at the concave surface of where hilum is located
What are the names of the tonsils located in the oral cavity and what differentiates them from other lymphoid tissue? What are the tonsils located in the nasopharynx?
The palatine tonsils, lingual tonsils and tubal tonsils are all located in the oral cavity.
The pharyngeal tonsil is located in the nasopharynx and is also called adenoids.
What is the location of isolated lymphatic nodules?
Peyers patches of the small intestine
What part of the lymph node shoes there is an active infection occurring ?
The germinal centers which are located in lymphoid follicles in the cortex would be enlarged.
Dividing B cells are found in germinal centers.
What is the purpose of the thymus? Where is the organ located and when is the organ the largest? Describe histology of the tonsil
It’s where T lymphocytes mature.
It’s located primarily in the thorax and is largest in children and atrophies during adolescence
Contains capsule, cortex, medulla and thymic corpuscles
What happens to fetal thymus lymphocytes during the selection process if they are reactive to body’s antigens?
These cells would be destroyed
What is the thoracic duct and where does it begin?
It begins from a dilated sac called the cisterna chyli. Lymphatic vessels travel from the abdomen and thorax to duct. This duct drains into venous blood circulation through the junction between internal jugular and subclavian veins
What is the lymphatic duct and where does it begin?
Drains from the lymph vessels in the right side of upper torso, and drains into the junction between the internal jugular and subclavian veins.
