Haematology

Hematopoiesis lineage diagram showing a multipotential hematopoietic stem cell branching into myeloid and lymphoid progenitors, with megakaryocytes producing thrombocytes.

Erythropoiesis

Simplified illustration of a macrophage with an irregular pale purple cell body, a large central purple nucleus, and numerous white and purple internal vesicles.

Mononuclear Phagocyte System

Diagram of a platelet cross-section labeled with microtubules, dense tubules, surface-connected tubules, coat, glycogen, mitochondria, alpha granules, and dense granules.

Platelets

Diagram of the coagulation cascade showing intrinsic, extrinsic, and common pathways, with clotting factors, thrombin, fibrin formation, and anticoagulant regulators.

Coagulation

Table summarizing blood groups A, B, AB, and O, showing red blood cell types, plasma antibodies, and red blood cell antigens.

Blood Groups

Iron Metabolism

Popular

Diagram of the HPA axis showing stress and diurnal regulation influencing the hypothalamus, which releases CRH to stimulate the anterior pituitary to release ACTH. ACTH stimulates the adrenal cortex to produce cortisol, which affects multiple target organs and provides feedback inhibition.
Anterior Pituitary Gland

Cortisol and the HPA Axis

by Kishan Pankhania and Elly Voogt

Innate Immune System

The Complement System

by Aneeqa Shaikh

Electrolytes

Calcium Regulation

by Bethany Moody