Images Dated 26th January 2005

Human heart

Human heart. Computer artwork of a healthy human heart, seen in external view. The main blood vessels servicing the heart are visible at the top of the image. At upper left is the vena cava, where blood arrives from the body. Blood is pumped through that side of the heart to the lungs and back to the heart through the pulmonary system of blood vessels (upper right). Oxygenated blood is then pumped to the rest of the body through the main artery, the aorta (arched, upper centre) The heart is supplied with fresh blood through the coronary arteries (purple) seen on the surface of the heart

© PASIEKA/SCIENCE PHOTO LIBRARY

JML04948

European brown tabby (Felis catus) looking down at something out of frame, white background

© Labat-Rouquette/AUSCAPE All rights reserved

European Brown Tabby Felis Catus Looking Down At Something Out O, White Background Domestic Animal Animals Pet Pets

False-colour SEM of a section of lung tissue

Lung tissue. False-colour scanning electron micrograph (SEM) of a section of lung tissue. The image shows several alveolar ducts and alveolar sacs (large, irregular dark areas) together with a few alveoli (smaller round dark areas). The alveoli are separated by a porous membrane known as the interalveolar septum. The tiny openings in the interalveolar septum are sectioned capillaries and it is in this intricate network of capillaries that the exchange between carbon dioxide and oxygen takes place. Many red blood cells are scattered throughout the frame. Magnification: x110 at 6x7cm size. x170 at 4x5ins

© PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY LA SAPIENZA , ROME/SCIENCE PHOTO LIBRARY