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
Whale Rider because "she has done enough damage" with her presumption. Also, the largest whale traditionally belongs to the legendary Paikea. When Koro walks away, Pai climbs onto the back of the largest whale at the location and coaxes it to re-enter the ocean. The whale leads the entire pod back into the sea; Pai submerges completely underwater, and the spectators wonder if she has drowned, but are relieved when she comes back above sea level. When she goes out to sea, Nanny shows Koro the whale tooth which Pai had previously recovered. When Pai is found and brought to the hospital,