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Not one of your nasty , natty modern little spirals but a solid rectangular one , covering the whole wall , with separate cubicles for every element , and the actual elements , whenever possible , in place . And yet , when your own wallet is taking a hit , your personal HDTV demo takes on a deeper meaning than a whole wall of CES screens can ever have . A ventricular septal defect occurs when the septum , the muscular wall separating the ventricles , fails to form fully during fetal development . ' There is now wall to wall support for it . They swim by jet-propulsion , sucking water into the mantle cavity , a space near the mouth , and shooting it out through a tube called the siphon by strong contractions of the mantle 's muscular wall . Here , the defensive wall was furnished with semicircular bastions at regular intervals . By this time the south wall of the amphitheater cast a narrow shelf of shadow , and the party withdrew to this refuge . Attached to the south wall of the Kleinpell Fine Arts Building , the sundial was placed in recognition of the services of Richard D. Swensen , who joined the River Falls faculty in 1955 and served as chairman of the chemistry department and , from 1969 to 1988 , as dean of the College of Arts and Sciences .