- Life Sciences
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.
a blood vessel that carries blood away from the glomerulus and branches to form a capillary...
modified phloem parenchyma cells that help translocate food substances in the plant.