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Home > All Images > 1999 > April > 20 Apr 1999

Images Dated 20th April 1999

Available as Framed Photos, Photos, Wall Art and Gift Items

Choose from 13 pictures in our Images Dated 20th April 1999 collection for your Wall Art or Photo Gift. Popular choices include Framed Photos, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.

Coloured SEM of an earthworm, Lumbricus t Featured 20 Apr 1999 Print

Coloured SEM of an earthworm, Lumbricus t

Common earthworm. Coloured scanning electron micrograph (SEM) of the rear end of a common earthworm (Lumbricus terrestris). The anus (light brown) is found on the earthworm's last segment (pygidium). Also visible are the chaetae, tiny thorn-like projections which are used for movement. Adult earthworms can grow up to 30cm in length. Their diet consists of organic substances in the soil. They aid the regeneration of mineral supplies, and their movement helps to break up the soil and improve aeration. They are thus vital to the regeneration of arable soils. Magnification unknown