backward movement of epiglotis
Prevents food and water entering the lungs
Phospholipids in the cell membrane prevent water from entering a cell.
epiglottis
Phospholipids
Drink a lot of water
The epiglottis is the flap that prevents food and water from entering the trachea.
Because you dont breath when you drink water
the eustachian tube
The cell membrane or cell wall.
the eustachian tube
Temporarily prevents urine infection.
The casparian strip is a waterproof barrier in the endodermis of plant roots that blocks the passive flow of water and minerals between cells. This ensures selective uptake of essential nutrients and prevents harmful substances from entering the stele.