Handwritten medical student notes on "Blood Physiology" - Chapter 18. Lined paper background with blue and red pen handwriting style. Include these sections with headings underlined: BLOOD PHYSIOLOGY (large title, circled) 1. COMPOSITION OF BLOOD • Plasma (55%) + Formed Elements (45%) • Hematocrit: Women ~40%, Men ~45% • Newborn: ~55% → falls to ~35% at 2 months → rises at puberty 2. PLASMA • Pale-white watery solution • Proteins: ~7.0 g/dL → oncotic pressure ~25 mmHg • Albumin: 3.5–5.5 g/dL (synthesized by liver, t½ ~20 days) • Main proteins: Albumin, Fibrinogen, Globulins, Coagulation factors 3. RED BLOOD CELLS (Erythrocytes) • Biconcave disc, no nucleus • Hb: Men 14–17 g/dL, Women 12–16 g/dL • Life span: ~120 days • Production: Erythropoiesis (bone marrow) • EPO stimulates production (kidney) 4. WHITE BLOOD CELLS (Leukocytes) • Normal count: 4,000–11,000/μL • Types: Neutrophils (60–70%), Lymphocytes (20–30%), Monocytes (5–8%), Eosinophils (2–4%), Basophils (<1%) 5. PLATELETS (Thrombocytes) • Count: 150,000–400,000/μL • Life span: ~10 days • Role: Hemostasis, clot formation 6. BLOOD VOLUME • ~70 mL/kg (women) | ~80 mL/kg (men) • Total RBC volume: ~28 mL/kg (women) | ~36 mL/kg (men) Small diagrams: a test tube showing layers (plasma/buffy coat/RBCs) and a biconcave RBC sketch. Star/arrow annotations. Slightly messy handwriting with color highlights.