Skip to main content
Framed Pictures, Canvas Prints
Posters & Jigsaws since 2004
Home > All Images > 1989 > April > 5 Apr 1989

Images Dated 5th April 1989

Choose from 9 pictures in our Images Dated 5th April 1989 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

F/col TEM of section through blood platelets Featured 5 Apr 1989 Image

F/col TEM of section through blood platelets

False colour transmission electron micrograph of a section through activated blood platelets. Platelets (thrombocytes) are formed in the bone marrow, and circulate in blood in large numbers. In an unactivated state they are round/oval, whereas activated platelets develop pseudopodia, or extensions from the cell walls. Platelets contain cytoplasmic organelles such as mitochondria (small grey bodies), endoplasmic reticulum & granules (dark stain). Platelets function in 2 ways; they plug defects in the walls of capillaries & also are involved in clott- ing. They also release serotonin, a blood vessel constrictor substance. Mag: x22, 000 at 6x7cm size