Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 11 days development, showing beating heart and blood flowing over gills, Ecuador. Endangered. (non-ex)
01626496
Morley Read / Developing embryo of the Ecuadorian monkey frog (Phyllomedusa ecuatoriana), showing heart beating and blood flowing, Morona Santiago Province, Ecuador, (non-ex)
01631499
Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 11 days development, showing beating heart and blood flowing over gills, Ecuador. Endangered. (non-ex)
01631497
Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 11 days development, showing beating heart and blood flowing over gills, Ecuador. Endangered. (non-ex)
01631496
Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 10 days development, showing beating heart and blood flowing over gills, Ecuador. Endangered. (non-ex)
01620047
Tony Wu / Sperm whale (Physeter macrocephalus) nostril. This species have a single blowhole on the left side of their heads. The other nostril has been modified into an internal organ called the phonic lip that...
01618858
Matthew Maran / Meat offal, including sheep hearts, for sale at butchers counter. North London, England
01592505
Lucas Bustamante / Reticulated glass frog (Hyalinobatrachium valerioi) viewed through hole in leaf seeing internal organs through its transparent skin, Canande, Esmeraldas, Ecuador.
01592504
Lucas Bustamante / Female Reticulated glass frog (Hyalinobatrachium valerioi) viewed from below seeing internal organs through transparent skin, Canande, Esmeraldas, Ecuador.
01519480
Steve Downer / Close-up larva of Fruit fly (Drosophila melanogaster) showing internal structure, UK
01479023
Ingo Arndt / Scientists implanting wires in the brain of a Desert locust (Schistocerca gregaria) to measure brain activity. University of Marburg, Germany. November 2013.
01479022
Ingo Arndt / Scientists implanting wires in the brain of a Desert locust (Schistocerca gregaria) to measure brain activity. University of Marburg, Germany. November 2013.