MICROANATOMY

Detailed explanation-1: -Contractility is the ability of muscle cells to forcefully shorten. For instance, in order to flex (decrease the angle of a joint) your elbow you need to contract (shorten) the biceps brachii and other elbow flexor muscles in the anterior arm.

Detailed explanation-2: -Contractility is the ability to shorten forcibly when ade-quately stimulated. This ability sets muscle apart from all other tissue types.

Detailed explanation-3: -Contractility represents the ability of the myocardial muscle to shorten or thicken against a load. Although ejection fraction (EF) is the most common clinical assessment of contractility in practice, it is highly dependent on ventricular afterload.

Detailed explanation-4: -Concentric contraction refers to when the force of contraction exceeds the force of resistance, which results in muscle shortening and approximation of muscle origin and insertion. Eccentric contraction occurs when the force of contraction is less than the force of resistance.