With regard to biology, flesh is the soft substance of the body of a living thing. In a human or other animal body, this consists of muscle and fat; for vertebrates, this especially includes muscle tissue (skeletal muscle), as opposed to bones and viscera. Animal flesh may be used as food, in which case it is commonly called meat. In plants, "flesh" is similarly used to refer to the soft tissue, particularly where this is the edible part of fruits and vegetables.