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UNITEK LVN Term 2 Hematologic System and Disorders test with 100- correct answers
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UNITEK LVN Term 2 Hematologic System and Disorders test with 100- correct answers
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UNITEK LVN | Term 2 |Hematologic System and
Disorders test with 100%
correct answers
primary functions of the hematologic system
1. oxygenation
2. hemostasis (controlling bleeding)
bone marrow
- spongy center
- RBC and platelets are made
- vertebrae, ribs, sternum, skull, pelvis, long bones of legs
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kidneys
- located in back of abdominal cavity to right and left of aorta and inferior
vena cava
- manufactures hematopoietin in response to hypoxia
- stimulates productions of RBCs in bone marrow
, liver
- located in upper right quadrant of abdomen, under rib cage below
diaphragm
- manufactures clotthing facotrs
- clears old and damaged RBCs from circulation
spleen
- upper left quadrant of abdomen
- removes old RBCs from circulation
blood
- mixture of RBCs, platelets, clotting factors, plasma, WBCs, proteins,
electrolytes, hormones, enyzmes
- transports oxygen from lungs to tissues
- maintains hemostasis
- 6L in a healthy adult
erythrocytes
- released in bone marrow → transport o2 from lungs → tissues → carbon
dioxide from tissues → lungs
- flexible membrane, disk shaped, bioconcaved
- old RBCs filtered out of circulation by liver and spleen after 120 days
- type AB blood = both A and B antigens
- type O blood = neither A or B antigens
platelets
- produced in bone marrow
- activate blood-clotting system (forms a platelet plug)
- clotting mechanisms activated → repairs itself
- life span = 10 days (after being released in bone marrow)
clotting factors
platelets activate blood-clotting system → several clotting factors
activated
- numbered 1-XIII
- fibrinogen = factor I
- thrombin = factor II
- form fibrin matrix over wounded area
plasma
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