Nanomedicine, Volume I: Basic Capabilities

© 1999 Robert A. Freitas Jr. All Rights Reserved.

Robert A. Freitas Jr., Nanomedicine, Volume I: Basic Capabilities, Landes Bioscience, Georgetown, TX, 1999


8.2.1 Navigational Vasculography

Medical nanorobots may access the interior of the human body principally via the blood-carrying vasculature, representing ~5.4 liters or ~9% of total body volume. The blood vessels are of three types, each characterized by functional and structural differences. First, there is the high-pressure distributing system, made up of the arteries and smaller branches called arterioles, which convey oxygenated blood from the heart to all regions of the body (Section Second, there is a network of minute vessels, called capillaries, through which biologically important materials are exchanged between blood and tissues (Section Third, there is a low-pressure collecting system made up of veins and smaller branches called venules, which return the blood to the heart (Section The lymphatic system, an additional 3.3 liters of very low-pressure vasculature (Section, returns cell-filtered plasma to the main circulatory system.


Last updated on 19 February 2003