Skate head скачать в хорошем качестве

Skate head

Dr Andrew Gillis shows us an embryonic skate head and explains how the red denticles dotted all over it have very similar properties to human teeth. Cambridge University's Under the Microscope is a collection of videos that show glimpses of the natural and man-made world in stunning close-up. Check out the rest of the series here: http://bit.ly/A6bwCE Dr Gillis: "This is a picture of the head of an embryonic skate (Leucoraja erinacea). A skate is a cartilaginous fish, closely related to sharks and stingrays. This embryo has been stained with dyes that colour the skeleton - cartilage is blue, and mineralised tissue is red - and then cleared with chemicals to make it transparent. The result is a specimen that shows the complex shape and arrangement of different skeletal tissues during embryonic development. I use this staining procedure to visualise the skeleton following experimental manipulation. This allows me to investigate how different genes and proteins are involved in controlling the formation and growth of different skeletal tissues in these fishes" The skate image is approximately 3cm across. More info: http://www.pdn.cam.ac.uk/~jag93 Music by Peter Nickalls: http://www.peternickalls.com With thanks: Graduate School of Life Sciences and its annual Poster and Image Competitions http://www.biomed.cam.ac.uk/gradschoo... Find more Cambridge research here: http://www.cam.ac.uk/research