Word: abdomen
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...been with sticklebacks, prickly fresh-water fish that make good subjects for "releaser" experiments. The male builds a nest of fine sticks and tries to persuade females to lay their eggs inside it. He wastes no time on nonpregnant females. But when he sees one with a swollen abdomen, her shape acts upon him as a powerful releaser. He rushes into the lists of love, displaying his own releaser: a bright red belly...
Dissected Love Affair. Professor Tinbergen observed this byplay; then he took it apart. First he proved that the male would attack as a rival a crude dummy fish with a red belly like his own. Professor Tinbergen then made a dummy with a swollen abdomen. This released a chain of mating reactions in the eager male, which tried to entice the dummy into his waiting nest...
...females, too, were susceptible. They followed a red dummy as if it were a male. When a female was in the nest, Professor Tinbergen gently poked her abdomen with the tip of a glass rod. She laid her eggs willingly...
...patient, he thought her trip to Charleston had been in vain. Blonde Betty Lee Woolridge was an almost classic example of the wreckage caused when a heart is crippled by rheumatic fever. At 21, Betty Lee weighed only 85 pounds; veins in her neck stood out like whipcords; her abdomen was swollen with a fluid by-product of congestive heart failure. Doctors in her home town of Canton, Ohio had told her she had only a year to live...
...back (not eating, not sleeping) and his belly a constant, burning torment. Months after he was back at work, he felt something like a big hole where the scalpel had slit his muscles; and for years he looked with awed distaste at the lumpy, four-inch scar on his abdomen...