Different Symptoms for Different Causes of Pain. Orchialgia caused by infection is severe and even in cutting pain accompanied by fever with chilliness, reddened and swollen scrotum, and apparent tenderness. Most bacterial orchitis is caused by adjacent epididymal inflammation, so it is also called epididymo-orchitis.
From Wikipedia, the free encyclopedia. Agnatha (Greek, no jaws) is a superclass of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct (conodonts and ostracoderms) species. The group excludes all vertebrates with jaws, known as gnathostomes.he Agnatha are ectothermic or cold blooded, with a cartilaginous skeleton, and the heart contains 2 chambers.
Any of various bony fish with fins that are rounded and fleshy, suggesting limbs. The lobe-finned fish are thought by some to be ancestors of amphibians and other land-dwelling vertebrate animals.They first appeared in the Ordovician Period and are extinct except for the coelacanth and lungfish.ny of various bony fish with fins that are rounded and fleshy, suggesting limbs. The lobe-finned fish are thought by some to be ancestors of amphibians and other land-dwelling vertebrate animals.