Osmosis occurs in living organisms as water moves across the cellular membrane. An environment is isotonic when the concentration of solutes in the environment is equal to the concentration of solutes inside the cell. In isotonic environments, water flows

The water will flow equally in both environments in and out of the cell.

Explanation:

Osmosis can be defined as the process in which the water or any other fluid moves from a higher concentration to lower concentration across a semi-permeable membrane.

In an isotonic solution the concentration of the solvent is same in both the environments that is inside and outside the cell. So the water or any other solvent will move or flow in defined equal volumes in each solution and the other solution.

trachea, alveoli, lung capillaries, arteries

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex