The main functions of a kitchen are to store, prepare and cook food (and to complete related tasks such as dishwashing). The room or area may also be used for dining (or small meals such as breakfast), entertaining and laundry. The design and construction of kitchens is a huge market all over the world.
A full bathroom is generally understood to contain a bath or shower (or both), a toilet, and a sink. An en suite bathroom or en suite shower room is attached to, and only accessible from, a bedroom.