MICROANATOMY

Detailed explanation-1: -The sarcoplasmic reticulum (SR) is a specialized form of the endoplasmic reticulum of muscle cells, dedicated to calcium ion (Ca2+) handling, necessary for muscle contraction and relaxation.

Detailed explanation-2: -Sarcoplasmic reticulum is a network of specialized smooth endoplasmic reticulum that is necessary for transmitting electrical impulses and also stores calcium ions. The muscle cells are rich in smooth endoplasmic reticulum so they are known as sarcoplasmic reticulum (membrane-bound structure rich in muscle cells).

Detailed explanation-3: -Ontogenesis of Striated Muscle The abundant sarcoplasm (i.e., cytoplasm) within the core of the myotube between and around nuclei contains membranous organelles. These are mitochondria with well-formed cristae, Golgi apparatuses generally located at the end of a nucleus, and single-membrane vesicles.

Detailed explanation-4: -The sarcoplasmic reticulum of cardiac muscle is found to be much less extensive and less precisely arranged in relation to the cross-banded pattern of the myofibrils, than it is in skeletal muscle. It is believed, nevertheless, that it may prove to have a significant role in the physiology of the myocardium.