How do orcas stay warm under water for hours at a time?
Orcas, also known as killer whales, are marine mammals that spend most of their lives in the water. They are found in all oceans of the world, but they are most common in cold waters near the poles. Orcas are well-adapted to cold water thanks to a thick layer of blubber and a number of physiological adaptations.
Blubber
Blubber is a thick layer of fat that surrounds the body of an orca. It provides insulation, helping to keep the orca warm in cold water. Blubber also stores energy, which the orca can use to fuel its activities.
Physiological adaptations
Orcas have a number of physiological adaptations that help them to stay warm in cold water. These adaptations include:
- A high metabolic rate, which helps to generate heat
- A large heart and lungs, which help to circulate blood and oxygen throughout the body
- A thick layer of fur, which helps to trap heat
Other factors
In addition to blubber and physiological adaptations, there are a number of other factors that help orcas to stay warm in cold water. These factors include:
- Spending time in groups, which helps to conserve heat
- Swimming in warm water, when available
- Hunting for prey, which helps to generate heat
FAQ:
- What is blubber? A thick layer of fat that surrounds the body of an orca.
- What is the purpose of blubber? To provide insulation and store energy.
- What are some physiological adaptations that help orcas stay warm? A high metabolic rate, a large heart and lungs, and a thick layer of fur.
- What are some other factors that help orcas stay warm? Spending time in groups, swimming in warm water, and hunting for prey.
- Where are orcas most commonly found? In cold waters near the poles.
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