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Home > All Images > 2004 > April > 13 Apr 2004

Images Dated 13th April 2004

Choose from 74 pictures in our Images Dated 13th April 2004 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Formula One World Championship: Roland Ratzenberger Simtek S941 was tragically killed in a crash during the Saturday qualifying session Featured 13 Apr 2004 Print

Formula One World Championship: Roland Ratzenberger Simtek S941 was tragically killed in a crash during the Saturday qualifying session

Roland Ratzenberger (AUT) Simtek S941 was tragically killed in a crash during the Saturday qualifying session.
San Marino Grand Prix, Rd 3, San Marino, Italy, 1 May 1994

© Sutton Motorsport Images

Computer artwork of a human kidney & adrenal gland Featured 13 Apr 2004 Print

Computer artwork of a human kidney & adrenal gland

Kidney & adrenal gland. Artwork of a human kidney (red) with an adrenal gland (orange, upper right) and a ureter (orange, lower right). A person's two kidneys filter blood to remove excess water, salts & waste products. These are excreted as urine and pass along the ureter to the bladder. The kidneys regulate the balance between the blood's fluid and salts, and its acidity level. The kidneys regulate blood pressure by secreting the enzyme renin. The adrenal gland's inner portion (medulla) secretes the hormone adrenalin (epinephrine) in times of times of stress to prepare it for physical exert- ion. The outer portion (cortex) produces about 30 steroid hormones that regulate metabolism

© PASIEKA/SCIENCE PHOTO LIBRARY

Dodder twining round host stem Featured 13 Apr 2004 Print

Dodder twining round host stem

The stem of a plant entwined with dodder, Cuscuta americana. This is a parasitic non-green plant of the family Convolvulaceae. The seed of the dodder germinates sending a little root into the ground while the shoot elongates rapidly, growing in ever- widening circles. If it meets a suitable host plant it twines around the stem and produces suckers or haustoria which penetrate the tissues of the host. The xylem and phloem of these organs make contact with those of the host, and thus the parasite obtains organic substances as well as water and salts. Meanwhile the root of the dodder dies. Once established it produces leaves and flowers and grows vigorously

© DR MORLEY READ/SCIENCE PHOTO LIBRARY