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| a network of cells and cell-forming tissue that protects the body from pathogens, destroys infected, malignant cells, and removes cellular debris |
| the roof of the mouth, consisting of a hard palate and a soft palate that separates the oral cavity from the nasal cavity |
bladder blad·der (blād'ər)
n.
Any of various distensible membranous sacs, such as the urinary bladder, that serve as receptacles for fluid or gas.
A blister, pustule, or cyst filled with fluid or air; vesicle.
bladder (blād'ər) Pronunciation Key
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A stretchable saclike structure in the body that holds fluids. The term is used most often to refer to the urinary bladder, which is part of the excretory system. Another kind of bladder is the gallbladder.