Vitamins

Vitamin K

Picture demonstrating stages of normal absorption of B12. Parietal cells release both intrinsic factor and components that form HCl-. HCl- activates pepsin. Together HCl- and pepsin digest proteins and free B12. Complex Formation in the duodenum. B12 and Intrinsic Factor form a complex. The complex travels to the terminal ileum where it is absorbed. Once absorbed B12 travels to the liver where it is stored.

Vitamin B12

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Motor System

Upper Motor Neurones

by Peter Dudley

Hypothalamus and Pituitary

The Hypothalamus

by Kishan Pankhania, Harriet Virely and Libby Beckingham

Tissue Structure

Epithelial cells

by Charlotte Smith