Cetacean anatomy

right|upright=0.75|frame|Baleen hair is attached to each baleen plate.|alt=Photo displaying dozens of baleen plates. The plates face each other, and are evenly spaced at approximately intervals. The plates are attached to the jaw at the top, and have hairs at the bottom end. upright=0.75|thumb|Appearance of baleen hair in a whale's open mouth upright=0.75|thumb|Cross-section of jaw showing bone a, gum b, rigid plate c and frayed baleen hairs d and e

hole (or spiracle) at the top of the head

organ in whales

Marine Mammal Anatomy