Images Dated 28th April 2005

SAS-82

SAS-82
Pile of quaders - boulders weathered to quaders in Giant's Playground
Giant's playground, Keetmanshoop, Nambia, Africa
Steffen & Alexandra Sailer

© Steffen & Alexandra Sailer / ardea.com

Africa, African, Aloe, Arid, Balancing, Boluder, Boulders, Countries, Country, Desert, Dry, Earth And Environment, Erosion, Geography, Geology, Kalahari, Keetmanshoop, Namibia, Native, Plant, Rock, Rock Formations, Rocks, Rocky, San People, Shapes, Southern Central Africa, Store, Succulent, Sun, Sun Rise, Sun Up, Survival, Survive, Tissue, Tree, Water Reservoir, Water Storage

Osteoclast, TEM

Osteoclast. Coloured transmission electron micrograph (TEM) of an osteoclast (blue and purple). Osteoclasts are found in cavities, known as Howslip's lacunae, on the surface of bones. They remodel bone, by degrading and reabsorbing it, in response to growth or changing mechanical stress. Osteoclasts are large multinucleate cells. They contain a large proportion of rough endoplasmic reticulum (strands in cell), which manufactures and modifies proteins. To the left of the osteoclast are collagen fibres (brown), which are part of the bone's organic matrix. Magnification: x 5000 when printed at 10 centimetres wide

© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Urine analysis

MODEL RELEASED. Urine analysis. Generalpractice doctor comparing a multiple test stick(Multistix) to its reference chart. The test stickhas been placed into a sample of a patient's urineto test for a variety of disorders. The dark brownpad shows that the patient has a large amount ofglucose in their urine, which is positive resultfor diabetes. In diabetic patients, levels ofglucose in the urine are abnormally high becauseof an insufficient production of the hormoneinsulin

© Ian Hooton/Science Photo Library