Why do wooden drawers and doors stick on humid days but not on dry days

something with passive transport? i know they stick because it absorbs the moisture...but i need the scientifical reason...

since the wood cells are drier than the surrounding air, through osmosis, water moves into their cells

when the air is dry, the process of osmosis goes the other way.

cells expand/contract and; therefore, the drawers warp in a different shape and don't fit as exactly the same as before

i don't know if this was helpful, but here it is anyway

Wood is porous and as a result, it tends to absorb moisture, which causes expansion. Unprotected wood is capable of expanding 6 or more inches during wet seasons. By contrast, when the air is dry, the same wood will dry out and slowly contract, causing it to grow smaller. Hot temperatures will also cause wood to swell to a certain degree, but for the most part, the swelling is more due to moisture in the wood fibers than it is to heat. The same is true of cold air, causing the wood to contract. Cold air tends to be much drier than hot air, so the lack of moisture causes the contraction.

Wood fibers are hydrophylic meaning water attracting.

True, the wood swells in the humidity. If you want a scientific answer, it's because the swelling increases the coefficient of friction between themoving parts...

water goes where there is less water. You know? which would explain why the cells absorb the water. the door is hypertonic.

Because they expand