Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating.
Emperor penguin - Aptenodytes forsteri. This is the largest species of penguins. Emperor penguins are only found on and around the Antarctic continent, on the thick pack ice and rarely on mainland. They have a pale yellow, open (breast and chin patch are one) patch on chin and breast. A long, thin and curved bill, typical for fish eaters. Very dark grey back and blue black head.
Penguins are found in a variety of habitats. Four of the 17 species of penguins live along the coast of Antarctica and the Antarctic Peninsula.he chinstrap penguin is one of four species of penguin which lives in Antarctica. It lives on some of the sub-Antarctic islands, and the Antarctic Peninsula, as well as the S â¦ outhern Ocean. Its habitat is rocky and icy coasts, and the open ocean.