Lymphatics WK9 L2 Flashcards
WHAT IS THE LYMPHATIC SYSTEM?
THE DRAINAGE SYSTEM OF THE BODY - NETWORK IN BODY CONSITIONG OF LYMPH FLUID TUBES AND VESSELS THAT TRANSPORTS LYMPH
WHAT DOES THE LYMPHATIC SYSTEM DO?
CONSISTING OF A SERIES OF VESSELS THAT MOPS UP FLUID IN TISSUES
WHERE DOES THE LYMPH FLUID GO?
FLUID DRAINS THROUGH LYMPH NODES AND DRAINS INTO BLOOD STREAM
WHAT ARE THE FUNCTIONS OF THE LYMPHATIC SYSTEM?
IMMUNITY
LIPID ABSORBTION
FLUID RECOVERY
HOW DOES THE LYMPHATIC SYSTEM EFFECT IMMUNITY?
FLUIDS FROM CAPILLARY BEDS ARE FILTERED AT LYMPH NODES BY IMMUNE CELLS
IMMUNE CELLS RESPOND TO ENCOUNTERED FOREIGN CHEMICALS OR CELLS
HOW DOES THE LYMPHATIC SYSTEM EFFECT IPID ABSORBTION?
LACTEALS IN SMALL INTESTINE
ABSORBS DIETARY NUTRIENTS
HOW DOES THE LYMPHATIC SYSTEM EFFECT FLUID RECOVERY?
ABSORBS PLASMA PROTEINS AND FLUIDS FROM TISSUES AND RETURNS BACK TO THE BLOOD STREAM
WHAT IS LYMPH?
COLOURLESS FLUID SIMILAR TO PLASMA WITH LESS PROTEINS
FORMS FROM FLUID LEAKING OUT OF CAPILLARES
WHAT ARE LYMPHATIC CAPILLARES?
SMALLEST OF LYMPHATIC VESSELS
CLOSED AT ONE END AND FILTER FLUID FROM BODYS CELLS AND TISSUES
HOW ARE THE LYMPHATIC CAPILLARES CONSTRUCTED?
MADE OF ENDOTHELIAL CELLS CLOSELY OVERLAPPED
WHAT DO THE ENDOTHELIAL CELLS DO?
ALLOW BACTERIA AND OTHER CELLS ENTRANCE INTO LYMPHATIC CAPILLARIES
LAYERED CELLS CREATES VALVE LIKE FLAPS THAT OPEN WHEN INTERSTITIAL FLUID PRESSURE IS HIGH, AND CLOSE WHEN IT IS LOW
WHAT IS THE ROUTE OF THE LYMPHATIC SYSTEM?
LYMPHATIC CAPILLARIES CONVERGE TO FORM COLLECTING VESSELS
COLLECTING VESSELS
LYMPHATIC TRUNKS
COLLECTING DUCTS
WHAT ARE THE COLLECTING VESSELS?
VESSELS THAT START DRAINING FLUID THROUGH LYMOH NODES
WHAT DO THE COLLECTING VESSELS DO?
DRAIN FLUID FROM THE LYMPH NODES AND CONVERGE TO FORM THE LYMPHATIC TRUNKS
WHAT DO THE LYMPHATIC TRUNKS DO?
6 OF THEM DRAIN LARGE AREAS OF THE BODY AND CONVERGE TO FORM THE R AND L COLLECTING DUCTS
WHAT DOES THE R COLLECTING DUCT DO?
RECEIVES LYMPH FROM R ARM, R SIDE OF HEAD AND THORAX, THEN EMPTIES INTO R SUBCLAVIAN VEIN
WHAT DOES THE L COLLECTING DUCT DO?
RECEIVES LYMPH FROM BELOW DIAPHRAM, L ARM, L SIDE OF HEAD, NECK AND THORAX, THEN EMPTIES INTO L SUBCLAVIAN VEIN
WHICH COLLECTING DUCT IS THE LARGEST?
THE L COLLECTING DUCT BEING LARGER AND LONGER \
BEGINS AS A PROMINENT SAC IN ABDOMEN CALLED CISTERNA CHYLI
WHY IS THE L COLLECTING DUCT LARGER?
BECAUSE IT DRAINS A LARGER AREA
WHAT ARE THE MECHANISIMS OF LYMPHATIC RETURN?
RHYTHMIC CONTRACTING OF LYMPH VESSELS SKELETAL MUSCLE PUMP THORASIC PUMP VALVES BLOOD FLOWING IN SUBCLAVIAN VEINS EXERCISE
WHAT DOES RHYTHMIC CONTRACTING OF LYMPH VESSELS DO DURING LYMPHATIC RETURN?
STRETCHING OF VESSELS STIMULATES CONTRACTION
WHAT DOES THE SKELETAL MUSCLE PUMP DO DURING LYMPHATIC RETURN?
WHEN MUSCLE CONTRACTS, THE LYMPHATIC VESSEL CONTRACTS FORCING LYMPH UPWARDS
WHAT DOES THE THORASIC PUMP DO DURING LYMPHATIC RETURN?
INHALATION CRATES PRESSURE ON THE LYMPHATIC VESSELS
WHAT DO THE VALVES DO DURING LYMPHATIC RETURN?
STOP THE BACKFLOW FOR LYMOG FROM GOING BACK DOWN THE LYMPHATIC VESSEL AFTER MUSCLE CONTRACTION
WHAT DOES BLOOD FLOWING IN SUBCLAVIAN VEINS DO DURING LYMPHATIC RETURN?
FLOWING BLOOD DRAWS IN THE LYMPH
WHAT ARE THE MAJOR TYPES OF LYMPHATIC CELLS?
T LYMPHOCYTES - T CELLS
B LYMPHOCYTES - B CELLS
NATURAL KILLER CELLS - NK CELLS
WHAT DO T LYMPHOCYTES - T CELLS DO?
RECOGISE AND ATTACK FOREIGN ANTIGENS
MATURE IN THYMUS
WHAT DO B LYMPHOCYTES - B CELLS DO?
ACTIVATION CAUSES PROLIFERATION AND DIFFERENTIATION INTO PLASMA CELLS THAT PRODUCE ANTIBODIES
MATURE IN BONE
MEMORY B CELLS THAT DO NOT DIFFERENTIATE
WHAT DO NATURAL KILLER CELLS - NK CELLS DO?
ATTACKS BACTERIA, TRANSPLANTED TISSUES AND INFECTED HOST CELLS
WHAT ARE LYMPH NODES?
ELONGATED KIDNEY BEAN SHAPED STRUCTURE ROUGHLY 3CM IN SHAPE
WHAT ARE THE FUNCTIONS OF LYMPH NODES?
FILTER THE LYMPH AND ACT AS A SITE FOR T AND B CELL ACTIVATION
WHAT DO LYMPH NODES CONTAIN?
RETICULAR AND DENDRITIC CELLS ABD ALSO MACROPHAGES WHICH PHAGYOCITISE FOREIGN MATTER
HOW MANY LYMPH NODES ARE THERE?
ROUGHLY 450
WHERE ARE THE LYMPH NODES LOCATED?
GROIN, AXILLA, CERVICAL REGION, ABDOMEN, BEHIND KNEE
WHAT IS THE THYMUS?
A LYMPHATIC ORGAN IN THE SUPERIOR MEDIASTINUM
WHAT DOES THE THYMUS DO?
HOUSES DEVELOPING LYMPHOCYTES AND SECRETES HORMONES TO PROMOTE THE DEPLOYMENT AND DEVELOPMENT OF T CELLS
WHAT DOES THE THYMUS CONTAIN?
EPITHELIAL CELLS THAT FORM THE BLOOD THYMUS BARRIER
WHAT IS THE SPLEEN?
LARGEST LYMPHATIC ORGAN LOCATED BETWEEN STOMACH, DIAPHRAM, AND L KIDNEY
WHAT DOES THE SPLEEN DO?
PRIMARILY AN OPEN MICROCIRCULATION
BLOOD PRODUCTION IN FEOTUS AND RED BLOOD RESERVIOUR
IMMUNE SURVEILANCE WITH LARGE NUMBER OF WHITE BLOOD CELLS
WHAT DOES THE SPLEEN CONTAIN?
HAS TWO TISSUES CALLED WHITE AND RED PULP
WHAT IS IN THE WHITE PULP?
WHAT IS IN THE RED PULP?
LARGE NUMBER OF RED BLOOD CELL SUPPLY
