kontraktilised
Kontraktilised refers to the ability of certain biological structures, particularly cells and tissues, to contract or shorten. This phenomenon is fundamental to a wide range of physiological processes in living organisms. The most prominent example is muscle tissue, which is highly specialized for contraction. Within muscle cells, specialized proteins called actin and myosin interact in a sliding filament mechanism to generate force and movement. This contractile ability allows for locomotion, internal organ function like the beating of the heart and peristalsis in the digestive system, and even the manipulation of objects.
Beyond skeletal and smooth muscle, other cell types also exhibit contractile properties. For instance, fibroblasts, connective