Multicellular beings
In multicellular organisms , cells have developed specialized tasks and are grouped together in tissues. This is the case of cardiac muscle tissue, which is responsible for the contraction of the heart. Tissues, in turn, are organized into organs. The heart, formed by different tissues, is an organ. Different organs, which work in a coordinated manner towards the same objective, constitute an organ system. The heart is part of the circulatory system. Finally, different organ systems are organized into an organism. A mammal, such as a wolf, is an organism... Did you know?