Whales appearance

1. Whales appearance
Like all mammals, whales breathe air, are warm-blooded, nurse their young with milk from mammary glands, and have body hair. Beneath the skin lies a layer of fat called blubber, which stores energy and insulates the body. Whales have a spinal column, a vestigial pelvic bone, and a four-chambered heart. The neck vertebrae are typically fused, trading flexibility for stability during swimming.

2.The reasons for being endangered
- Loss of habitat most likely due to the encroachment of the human race.
- Loss of tranquility most likely due to the encroachment of the human race.
- Water pollution
- Some widespread cataclysmic event such as a meteoroid impact, fire, tsunami, earthquake, volcanic eruption, flood, drought, hurricane, change of climate, etc.

2013-04-06 15:54:14 補充：
You can go to http://en.wikipedia.org/wiki/Whale#Anatomy and look at "Anatomy" part of it..

Hope can help you=]

Whales have been an important part of peoples’ lives for thousands of years. They provide meat, fat, oil, leather, tools, and other materials for making useful, needed things. Unfortunately, human activity has caused many whale populations to plummet. Out of the 11 species of great whales, seven are listed as endangered or vulnerable in Canada