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Cnidarians have specialized stinging cells called cnidocytes
Animals of Hindustan monkeys called bandar that can be taught to do tricks
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Arthroscopic surgery. In this illustration, the knee joint is undergoing surgery with a specialized
In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
Cancer cells can move to new locations in the body, a process called metastasis