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a strong ring of smooth muscle at the end of the pyloric canal which lets food pass from the stomach to the duodenum.
the osmotic pressure that develops within the cells of a root system that causes the sap to rise...
a type of nuclear division during which somatic cells divide into new cells for growth or to...
region of the kidney into which urine is discharged from the collecting ducts of the nephrons,...
a system of support in soft-bodied animals, which relies on pressure of fluids in the body...