What are lymph node sinuses?
A lymph node contains lymphoid tissue, i.e., a meshwork or fibers called reticulum with white blood cells enmeshed in it. The regions where there are few cells within the meshwork are known as lymph sinus. It is lined by reticular cells, fibroblasts and fixed macrophages.
Which cells cluster around medullary sinuses of lymph nodes?
30 Cards in this Set
| Names the structures that ensure the one way flow of lymph through the node? | Valves in the Afferent & Efferent Lymphatic |
|---|---|
| the third important cell type in lymph nodes (usually found clustered around medullary sinuses) are the? these cells act as? | Macrophages, phagocytes |
What do medullary cords do?
The medullary cord is a dense structure in the lymph node, and it is composed of lymphatic tissue. These cords are found within the lymph node’s medulla, which is located in the center of the node. They function by producing antibodies that flow out of the lymph node via the lymph fluid.
What are medullary sinuses?
The medullary sinuses (or sinusoids) are vessel-like spaces that separate the medullary cords. The medullary sinuses receive lymph from the trabecular sinuses and cortical sinuses and contain reticular cells and histocytes. The medullary sinus drains the lymph into the efferent lymphatic vessels.
Are macrophages in the medulla of lymph node?
The medulla also contains macrophages that reside outside the sinuses, situated within the medullary cords. Another macrophage type present in reactive LNs, though not unique to these organs, is the tingible body macrophage, which has a specialized role in the uptake of apoptotic cells within germinal centers.
Do you need antibiotics for sinus infection?
Antibiotics are not needed for many sinus infections. Most sinus infections usually get better on their own without antibiotics. When antibiotics aren’t needed, they won’t help you, and their side effects could still cause harm.
What antibiotics treat sinus infections in adults?
The recommended choices are amoxicillin or amoxicillin/potassium clavulanate (Augmentin) for 5 to 10 days. Doxycycline is a good alternative for people with penicillin allergy, followed by levofloxacin or moxifloxacin.