The rat-tailed sea cucumber, Paracaudina chilensis, has abundant hemoglobin-filled hemocytes in its perivisceral coelom, water vascular system, and hemal system. The perivisceral oxyhemoglobin ...

The tangled mass of tubing, disks and light bulbs unveiled before a packed meeting of the Royal Society of scientists in London looked for all the world like an outsize example of abstract sculpture.

Free iron availability is strongly limited in vertebrate hosts, making the iron acquisition by siderophores inappropriate. Pathogenic bacteria have developed various ways to use the host's iron from ...