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PART 1
PART 2
PART 3
PART 4
PART 5
PART 6
PART 7
CHART CLUE
Three of Stina’s blood findings keep being read alone: a mild anemiaA condition characterized by a deficiency of red blood cells or hemoglobin, leading to reduced oxyge that no amount of iron will fix, a platelet count that climbs during every flare, and a serum CRP that sits sky-high year after year. Filed separately, they look like odd, harmless labs. Read together, they are one sustained acute-phase response and the liverA large organ that produces bile, detoxifies blood, and stores nutrients. is quietly seeding something dangerous.
The Story
A single spun tube of Stina’s blood tells most of the story at a glance. The straw-colored plasmaThe liquid component of blood. rises to the top, a thin pale band of white cellsThe basic structural and functional units of life. and platelets — the buffy coatThe thin layer of white blood cells and platelets between plasma and red blood cells in centrifuged — sits in the middle, and the dense red cells pack the bottom. The proportions matter: her packed red-cell fraction runs a little low (her anemia), while during flares that middle band thickens with extra platelets and neutrophils. The tube is a snapshot of her whole case.
Each fraction has a job. Plasma — about 55% of blood — is mostly waterThe universal solvent essential for life. carrying proteinsLarge molecules made of amino acids with various functions in the body. (albuminA plasma protein that helps maintain osmotic pressure and transport substances., clotting factors, antibodies), nutrients, hormones, and wastes. The formed elementsThe cellular components of blood, including red blood cells, white blood cells, and platelets. below it are red cells that carry oxygen, white cells that defend, and platelets that begin repair. Two quick measures name what the tube shows: the hematocritThe percentage of blood volume occupied by red blood cells. is the percentage of blood volume that is packed red cells, and the buffy coat is that thin white-cell-and-platelet layer between plasma and red cells. Building this inventory first matters because every clue in Stina’s chart — low hematocrit, flare-time platelets, acute-phase proteins in the plasma — is just one of these fractions behaving abnormally.
From Stina’s chart: Spin a tube of Stina’s blood and it separates into plasma, a thin buffy coat, and packed red cells — a layered inventory of everything this module will follow.
Compare Stina’s uninfected appendixA small, finger-like pouch attached to the cecum, thought to play a role in immune function. to an infected appendix.
Activity:
Activity:
The red cells at the bottom of the tube don’t last forever — they’re born, they work for months, and they’re retired. Follow one through its life, because that cycle is exactly where Stina’s anemia begins.
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The Anemia That Won’t Quit
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Making and Recycling Red Cells
List of terms
- anemia
- liver
- plasma
- cells
- buffy coat
- water
- proteins
- albumin
- formed elements
- hematocrit
- appendix