Sperm whale . Myoglobin, which stores oxygen in muscle tissue, is much more abundant than in terrestrial animals. The blood has a high density of red blood cells, which contain oxygen-carrying haemoglobin. The oxygenated blood can be directed towards only the brain and other essential organs when oxygen levels deplete. The spermaceti organ may also play a role by adjusting buoyancy (see below). The arterial retia mirabilia are extraordinarily well-developed. The complex arterial retia mirabilia of the sperm whale are more extensive and larger than those of any other cetacean. Atop the whale's skull is positioned a large complex of organs filled
Brain Exercise with Dr. Kawashima where every game will be played while monitoring its effect on the brain of the player. Brain Exercise with Dr. Kawashima The game is structured around a set of 15 minigames which are used in the different game modes. After selecting a profile (there are 3 slots for different users) a cel-shaded 3D Dr. Kawashima will accompany the player when browsing the menus and will explain the minigames. After playing each minigame in any of the game modes, player's performance is rated via a ranking of items found in nature, which includes creatures such as plankton, a whale or a