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S. Anat 14

Lymphatic System

Lymphatic system includes Lymph, lymphatic vessels, lymph nodes, lymph nodules, spleen, thymus
Fluid in lymphatic vessel Lymph
Lymph begins as Filtrate
Filtrate becomes from plasma in _____fluid Interstitial
Lymph helps maintain___ BP
Lymph vessels carry___ Lymph
Lymph vessels begin as blind/dead ended____ Capillaries
Blind/dead ended capillaries are called Lymph capillaries
Endothelial cells overlap lymph capillaries to create____to prevent Flaps, fluid from moving out
Specialized lymph capillaries in the villi of small intestines Lacteals
Lacteals absorb____soluble products Fat
Lymph in extremities flow via Skeletal muscle pump
Valves in skeletal muscle pumps made of endothelium from Flowing down/backwards
Lymph not in extremities is pushed toward heart by Vasoconstriction of lymph vessels
Creates pressure during breathing to push lymph from the vessels in the lunch and chest cavity Respiratory pump
Lymph all flows back into Blood stream
Vessels in lower body unite in from of L spine to form Cisteria chyli
Cisteria chili becomes___that travels along spine Thoracic duct
Thoracic duct unites with vessels of the left upper body and empty into___ L subclavian vein
Vessels of the Right upper body unite to form the R lymphatic duct
R lymphatic duct empties into R subclavian vein
Mainly consists of lymphocytes in a framework of connective tissue Lymphatic tissue
____migrate to lymphatic tissue and become activates WBC
Lymphocytes proliferate in response to ___in all lymphatic tissue infection
Has stem cells that produce most of the T lymphocytes Thymus
Masses of lymphatic tissue Lymph nodes
Lymph nodes are ___mm in diameter/length 10-20
Lymph nodes are encapsulated in__ Connective tissue
Lymph nodes are found in groups along___ Pathways/lymph vessels
Flows toward the node Afferent
Flows away from the node Efferent
Lymph passes through, pathogens are phagoytized by resident/fixed lymphocytes Macrophages
Node may___when fighing infectin Swell
Smaller than nodes Lymph nodules
Lymph nodules are ___(encapsulated/un Unencapsulated
Lymph nodules are located just beneath___ All mucosa
Lymph nodules in small intestines Peyers patches
Lymph nodules found in pharynx Tonsils
Just beneath diaphragm, behind stomach covered by ribs Spleen
IN fetus produces RBC Spleen
After birth acts as large node except it acts on blood not lymph Spleen
After birth containes plasma cells the produce antibodies Spleen
After birth contains fixed macrophages Spleen
Fixed macgophages after birth (aka) Reticuloendothelial cells (RE cells)
After birth stores platelets and destroys them when no lponger useful Spleen
Not a vital organ in adults Spleen
People without a spleen are slightly more susceptible to ____and___ Pneumonia, meningitis
Inferior to they thyroid gland Thymus
Larger in fetus Thymus
Very small in adults Thymus
Produces T lymphocytes Thymus
Also has endocrine function (secretes hormone) Thymus
Necessary for immunological competence Thymus
THymic hormone enables ___ T cells
Recognize foreign antigens and thus provide immunity T cells
The ability to destroy pathogens to prevent infecton Immunity
Mutated cells can also be recognized as Foreign
Organ stransplants are also recognized as Foreign
The chemical markers on cell membranes that identiful cells Antigens
Immunity has __main components 2
____immunity treats everything the same Innate
Nonspecific, no memory, doesn’t become more efficient with exposure Innate memory
Immunity barriers: keratinized epithelium Epidermis
Immunity barriers: prevent bacterial growth Sebum
Immunity barriers: antimicrobial made in the live epidermal cells Defensins
Immunity barriers: structural barrier Mucous membrane
Immunity barriers: sweep pathogens out to be swallowed Ciliated epithelium
Immunity barriers:enzyme in saliva and tears that destroy pathogens Lysozymes
Immunity barriers: in submucosa and subcutaneous tissue WBC
FOUnd in areolar connective tissue WBC
Release chemicals that contribute to inflammation WBC
Natural killer cells Lymphocytes
Found in blood, red marrow, spleen, and nodes Lymphocytes
Destroy pathogens and tumor cells by releasing chemicals like perforins Lymphocytes
Created by: Sarsileigh



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