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27 terms

lymphatic system

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lymphatic pathways bein as__that merge to form lymphatic vessels
lymphatic capillaries
The wall of a lymphatic capillary consists of a single layer of what?
squamous epithelium
Once tissue intersititual fluid is inside a lymph capillary, the fluid is called
lymph
Lymphatic vesels have walls similar to those of what?
veins
Lymphatic vessels contain something that help prevent the backflow of lymph, what is it?
valves
lymphatic vessels usually lead to what? that filer the fluid being transported
lymph nodes
the lymphatic trunk drains the head and neck is called the
jugular trunk
what is the larger and longer of the two lymphatic collecting ducts?
the thoracic trunk and the left lymphatic duct
Lymph nodes contain large numbers of white blood cells called
lymphocytes
The indented region where blood vessels and nerves join a lymph node is called the
hilum
the spaces within a lymoh node are called___through which lymph circulates
lymph sinuses
lymph enters a node through what?
an afferent lymphatic vessel.
the partially encapsulatd lymph node in the pharynx is called
tonsil
the aggregations of lymph nodules found within the mucosal lining o the small intestine are called
peyers patches
the lymph nodes in the cervical region are associated with the lymphatic vessels that drain what?
scalp face nasal pharynx
the lymph nodes associated with the lymphatic vessels which draink the lower limbs are located in what region?
inguinal region
the thymus is located in where?
mediastinum
the thymus reaches its greatest size during infancy and early childhood and tends to decrease in size following
puberty
as a person ages, the thymus tissue is often replaced by
adipose and other connective tissues
the lymphocytes of the thymus develop from precursor cells that originated in the
bone marrow
the hormones secreted by the thymus are called
thymosins
what is the largest organs of the lymphatic system
spleen
blood vessels enter the spleen through the region called the
hium
the sinuses within the spleen contain what?
blood
the tiny islands of t issue within the spleen that contain many lymphocytes comprise which kind of pulp
white pulp
which pulp of the spleen contains large numbers of red blood cells, lymphocytes, and macrophages
red pulp
what within the spleen engulfs and destroys foreign particles and cellular debris
macrophages