Flukes are among them. Flukes are the two lobes of the whale tail. While each whale has flukes, flukes themselves differ from species to species. In some whale species, flukes are so distinctive that researchers use them like fingerprints to identify individuals. whale uses his flukes to propel himself forward in the water and the flippers at his sides to steer and brake. As he swims, he moves the fluke up and down like a paddle, pushing himself forward with each stroke. Whales also use their flukes to get food into their mouths.
Effects on Physical Health. Introduction: During the relatively short history of the Nuclear Age, we have witnessed considerable damage to human physical health as a result of nuclear weapons. Long-term effects of nuclear explosions include cancers, tumors, genetic damage, infertility, and birth defects.
Health Effects of Pesticides. Studies of the health effects of pesticides on humans focus on two aspects, the acute toxicity, or immediate effects resulting from short-term exposure, and the chronic toxicity, or effects resulting from more-prolonged exposures.