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two bean-shaped guard cells surrounding a pore in the epidermis of a leaf that allow gases to enter and leave the leaf. The guard cells regulate the size of the pore in order to control the exchange of respiratory gases and the rate of transpiration.
the tube through which urine passes from the bladder to the exterior.
when a plant cell loses water and the cell membrane pulls away from cell wall.
organelles in which cellular respiration takes place to produce ATP to supply cells with energy...
a drug that inhibits (slows down) the action of the nervous system.
organic compound that always contains the elements carbon, oxygen and hydrogen. The building...