Chapter 1 (page 7) Flashcards
Type of loose connective tissue called:___________. It dominates all the lymph organs except the __________.
Reticular connective tissue
Thymus
What are the two types of lymphoid tissue?
Diffuse lymphatic
Lymphatic follicles
Where Diffuse lymphatic tissue can be found?
found in almost every body organ. Largely collects in lamina propria of mucous membranes and within lymphoid organs.
___________ - solid, spherical bodies consisting of tightly packed cells.
Lymphatic follicles
Where lymphatic follicles can be found?
They are found in larger lymphoid organs such as lymph nodes.
Isolated lymphatic follicles occur in the intestine wall as _________ and in the appendix.
Peyer’s patches
Consist of the lymph nodes, spleen, thymus, tonsils, and patches of intestine. All composed of reticular connective tissue and helps to protect the body is called:
Lymphoid Organs
As lymph is transported back to the bloodstream it is filtered through __________ that cluster along lymph vessels. throughout the body.
lymph nodes
What is the shape and size of a lymph nodes?
Bean shaped and less than 2.5 cm in length (can vary in size)
They are found in places where the lymph vessels converge to form large trunks such as the inguinal, axillary and cervical regions.
lymph nodes
What are the two functions of lymph nodes?
Act as lymph filters.
They help activate the immune system.
How lymph nodes acts as lymph filters?
Macrophages in nodes remove and destroy micro-organisms that have entered the lymph effectively preventing them from being delivered to the blood
and spreading further in the body.
Lymph nodes help activate the immune system by _________ the lymph stream for presents of antigens and mount an _________ against them.
monitoring
attack
A dense fibrous capsule from which connective tissue strands called:__________ extend inward to divide the node into a number of compartments surround each node.
trabeculae
Two regions of a node:
Cortex
Medullary cords
It contains densely packed follicles (collections of lymphocytes).
Cortex
__________ - thin inward extensions of cortex (contains phagocytic macrophages).
Medullary cords
Throughout the node are ____________ . Lymph enters convex side of node through __________________ . It moves through large bag-like sinuses. Then it enters smaller sinuses and into the ___________ .Lymph exits through ____________________________.
lymph sinuses
afferent lymphatic vessels
medulla
Hilus via efferent lymphatic vessels
Is it TRUE that, there are less afferent vessels then efferent vessels therefore flow of lymph is slow which allows time for the lymphocytes and macrophages to perform their functions.
False
When nodes become overwhelmed with bacteria they become inflamed and tender. They can also become secondary cancer sites. True or False?
True
