cellular - characterized by or divided into or containing cells or compartments (the smallest organizational or structural unit of an organism or organization); the cellular construction of a beehive; any effective opposition to a totalitarian regime must be secretive and cellular.
They are among the smallest of birds, most species measuring in the 7.5â13 cm (3â5 in) range. Indeed, the smallest extant bird species is a hummingbird, the 5-cm bee hummingbird, weighing less than a U.S. penny (2.5 g). They are known as hummingbirds because of the humming sound created by their beating wings which flap at high frequencies audible to humans.
The hummingbird flight muscles make up 30% of a hummingbirds total body weight. The Hummingbird video: watch this incredible video of a hummingbirds wing movement in super slow motion. They flap their wings up to 70 times per second; itâs heart rate can reach 1,260 beats per minute.