Blood, Lymphatic, and Respiratory Systems: Structured Study Notes

{"type":"doc","content":[{"type":"heading","attrs":{"textAlign":null,"level":2},"content":[{"type":"text","text":"Chapter 19: Blood"}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Major Components of Blood"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Blood is a specialized connective tissue with two main components: plasma and formed elements. Understanding their composition and function is essential for grasping blood physiology."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Plasma:"},{"type":"text","text":" The liquid portion (~55%), contains water, proteins, electrolytes, nutrients, hormones, gases, and wastes."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Formed Elements:"},{"type":"text","text":" (~45%) Includes erythrocytes (RBCs), leukocytes (WBCs), and platelets (thrombocytes)."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Centrifugation:"},{"type":"text","text":" Plasma forms the top layer, buffy coat (WBCs and platelets) is in the middle, and erythrocytes form the hematocrit at the bottom."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Functions of Blood"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Blood performs vital roles in the body, including transport, regulation, and protection."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Transport:"},{"type":"text","text":" Oxygen, carbon dioxide, nutrients, hormones, and wastes."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Regulation:"},{"type":"text","text":" Body temperature, pH, and fluid/electrolyte balance."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Protection:"},{"type":"text","text":" Immune defense and hemostasis (prevention of blood loss)."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Composition of Plasma and Major Plasma Proteins"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Plasma is mostly water, with proteins and solutes contributing to its functions."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Water:"},{"type":"text","text":" ~92% of plasma; solvent for transport."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Proteins:"},{"type":"text","text":" ~7%; includes albumin, globulins, and fibrinogen."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Albumin:"},{"type":"text","text":" Maintains colloid osmotic pressure; transports substances. Produced by the liver."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Globulins:"},{"type":"text","text":" Alpha and beta (liver) transport lipids, hormones, vitamins, metals; gamma (plasma cells) are antibodies."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Fibrinogen:"},{"type":"text","text":" (Liver) Converted to fibrin during clotting."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Erythrocytes (Red Blood Cells)"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Erythrocytes are specialized for gas transport and pH buffering."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Structure:"},{"type":"text","text":" Biconcave, flexible, lack nucleus and organelles."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Function:"},{"type":"text","text":" Transport oxygen and some carbon dioxide; buffer blood pH."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Lifespan:"},{"type":"text","text":" ~120 days."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Hemoglobin Structure and Breakdown"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Hemoglobin is the oxygen-carrying protein in RBCs, and its breakdown is tightly regulated."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Structure:"},{"type":"text","text":" Four globin chains, four heme groups (each with Fe2+)."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Function:"},{"type":"text","text":" Each hemoglobin binds four O2 molecules."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Breakdown:"},{"type":"text","text":" Old RBCs removed by macrophages; globin reused as amino acids, iron recycled, heme converted to biliverdin then bilirubin (excreted in bile)."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Erythropoiesis and Regulation"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Erythropoiesis is the process of RBC production, regulated by erythropoietin (EPO)."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Location:"},{"type":"text","text":" Red bone marrow."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Stimulus:"},{"type":"text","text":" Hypoxia triggers kidney release of EPO."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Requirements:"},{"type":"text","text":" Iron, vitamin B12, folic acid, amino acids."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Anemia: Causes and Symptoms"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Anemia is a reduction in RBCs or hemoglobin, leading to decreased oxygen delivery."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Causes:"},{"type":"text","text":" Blood loss, iron deficiency, vitamin B12/folate deficiency, kidney disease, bone marrow disorders, hemolysis."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Symptoms:"},{"type":"text","text":" Fatigue, weakness, pallor, dizziness, shortness of breath, tachycardia."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Leukocytes (White Blood Cells): Prevalence and Morphology"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"There are five major types of leukocytes, each with distinct morphology and prevalence."}]},{"type":"table","content":[{"type":"tableRow","content":[{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Leukocyte"}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Prevalence 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