Tag

Skin Anatomy

All articles tagged with #skin anatomy

science1 month ago•10 min saved

Dinosaur skin cells found inside hollow spikes reveal a mosaic of skin in a 125-million-year-old iguanodontian

A juvenile iguanodontian Haolong dongi from China's Jehol Biota preserves hollow spike–like skin structures that house epidermal cells at cellular resolution, showing a thick outer cornified layer and layered epidermis around a porous dermal core. The spikes are a skin organ rather than mere scales or bone, illustrating mosaic skin in dinosaurs and suggesting defensive or other functions, while noting that conclusions come from a single specimen and may not generalize.

via Space Daily|

#dinosaurs #hollow-spikes #keratinocytes

biology2 years ago•2 min saved

"Pink Fairy Armadillos: Unusual Double Skin Sets Them Apart from Other Mammals"

Pink fairy armadillos, the smallest armadillo species, have a unique double skin with an outer layer housing cornified scales and osteoderms, and an inner layer with fine white fur, making it a unique feature among mammals. Their protective armor, divided into two zones, serves to protect against predators and support their underground lifestyle. The evolution towards a completely subterranean lifestyle in their ancestral lineage is estimated to have taken place between 32 and 17 million years ago, driven by changing environmental conditions. The armadillo's body covering is similar to that of other subterranean mammals and has highly flexible hairs that help it move through underground tunnels.

via Yahoo Life|

#biology #evolution #mammals