Page 206 - (DK) The Ultimate Visual Dictionary 2nd Ed.

ANIMALS
Dolphins, whales,

and seals Rostrum (beak)
Forehead

DOLPHINS, WHALES, AND SEALS belong
to two orders of mammal adapted to living
Mouth
in water. Dolphins and whales make up the
order Cetacea. Typical cetacean features include
a streamlined, fishlike shape; forelimbs in the form Gape
(lower jaw)
of flippers; no visible hind limbs; a horizontally flattened Eye
tail; and thick blubber under the skin. There are two groups
of cetaceans: toothed whales, including sperm whales, white whales,
beaked whales, dolphins, and porpoises; and the larger whalebone (baleen)
whales, including rorquals, gray whales, and right whales. The blue whale—a
rorqual—is the largest living animal: an adult may be up to 100 ft (30 m) long
and weigh 145 tons (130 metric tons). Seals and their relatives—sea lions and
Flipper
walruses—make up the order Pinnipedia. Characteristically, they have a
streamlined, torpedo-shaped body; forelimbs and hind limbs modified as Belly
flippers; thick blubber; and no external ears.
5 digits
EXTERNAL FEATURES OF A SEAL
Auditory
meatus Mouth
Hind flipper
Gape (lower jaw)
Eye
SKELETON OF A SEAL Skull
Nostril
Vibrissa Thoracic Cervical
(whisker) vertebrae vertebrae

Mouth
5 digits
Lumbar
Front flipper vertebrae
Scapula
Mandible
Sacrum
Caudal Humerus
vertebrae
Ulna
Femur
Radius
Pelvis Rib Sternum
Carpals
Tibia
Phalanges Metacarpals
Fibula
Phalanges
Tarsals

Metatarsals

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