nutrients

Updated: May 18, 2025

To get from the digestive organs into the blood, the nutrients must pass through the mucous membrane lining these organs and also the walls of blood or lymph vessels. Only liquid materials can make this passage. It is necessary, therefore, to reduce to the liquid state all nutrients not already in that condition. This reduction to the liquid state constitutes the digestive process.

Francis M. (Francis Marion) Walters - Physiology and Hygiene for Secondary Schools