Courses

How does living muscle keep blood moving through the lungs and body? Explore the heart’s chambers, valves, electrical pathways, and changing workload, then explain what happens when one component no longer does its job.

Follow a breath from the nose to a living exchange surface, then follow oxygen into the circulation. Learn how pressure, tissue properties, regional blood flow and neural control work together in the human lungs.

Trace blood and tubular fluid through the human kidney. Learn how selective transport and feedback regulate water and solutes, why the kidney matters to blood pressure, oxygen carriage and bone, and what dialysis can replace.

Follow a meal through the human stomach. Learn how its wall supports secretion and protection, how accommodation and mixing differ from emptying, and what selected failures reveal about the organ.

How do networks of living cells support perception, movement, regulation and memory? Explore the human brain through eight reading chapters, original diagrams and carefully interpreted research.

How does one organ process incoming materials while supporting the rest of the body? Explore the human liver through six reading chapters, original diagrams and carefully interpreted research.

How does one organ help digest a meal and regulate the use of its nutrients? Explore the human pancreas through five reading chapters, original diagrams and carefully interpreted evidence.

How does material inside the gut become material the body can use? Follow two nutrients through digestion, epithelial transport, blood and lymph in five substantial chapters.

What happens after most digestion and absorption? Four substantial chapters connect the colon’s living surface, microbial activity, movement and controlled elimination.

How does the body’s boundary protect, sense, regulate and repair? Five substantial chapters connect layers, barrier maintenance, sensation, pigment and reconstruction.

How does light entering a living optical system become information for vision? Six substantial chapters connect anatomy, focusing, retinal signaling, detail and color, maintenance, and disruption.

How do mechanical events become information about sound and motion? Five substantial chapters explain the ear, sound transmission, cochlear signals, head-motion sensing and disrupted pathways.