Vitamins

Vitamin K

Infographic showing vitamin B12 digestion from the stomach through the duodenum to terminal ileum absorption.

Vitamin B12

Popular

Diagram of a nephron showing the glomerulus, proximal convoluted tubule, descending and ascending loops of Henle, distal tubule, and collecting duct, with explanatory text about filtration, reabsorption, and secretion.
Regulation

Water Filtration and Reabsorption

by Omar Haque

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

Mononuclear Phagocyte System

by Tanzeelah Jamadar

Graph comparing immune responses: a large, slower initial response, a smaller faster response after inapparent reinfection, and a sharp rapid response after mild or inapparent reinfection, with memory persisting over years.
Adaptive Immune System

T Cell Memory

by Emily Crawley