líffæru
Líffæru is a general term in Icelandic referring to an organ. An organ is a collection of tissues joined in a structural unit to serve a common function. Within a multicellular organism, organs are biological systems performing a specific function, such as the heart pumping blood or the stomach digesting food. These organs are composed of specialized cells and tissues that work together in a coordinated manner. Examples of common líffæru include the brain, lungs, liver, kidneys, and intestines. The specific structure and function of each organ are crucial for the overall survival and operation of the organism. Disruption to the normal functioning of any líffæra can lead to illness or disease. The study of organs and their functions is a significant part of biology and medicine.