Smooth muscle (shown below) is made up of fusiform (diamond-shaped) cells with a single nucleus. The cells are arranged in sheets and contain three filament types: a) actin filaments with no troponin and tropomyosin (5 - 8 times more actin than skeletal muscle).
Smooth muscle. Smooth muscle is represented from the stomach wall. Smooth muscle tissue is defined as a non-striated muscle tissue comprising involuntary contractile elements surrounding tissues and structures where contraction is part of normal function. 1. The structure of the smooth muscle tissue is quite different from that of other muscle tissue subtypes. The primary smooth muscle structural and functional unit – the smooth muscle myocyte (Myocytus nonstriatus) has unique structure, arrangement and innervation. The spindle shape of the mononucleated smooth muscle cell permits a close contact among cells in the splanchnic and vascular walls. The structure and function is basically the same in smooth muscle cells in different organs, but the inducing stimuli differ substantially, in order to perform individual effects in the body at individual times. In addition, the glomeruli of the kidneys contain smooth muscle-like cells called mesangial cells. It is divided into two subgroups; the single-unit (unitary) and multiunit smooth muscle. Within single-unit cells, the whole bundle or sheet contracts as a syncytium (i.e. a multinucleate mass of cytoplasm that is not separated into cells). Smooth muscle is found within the walls of blood vessels (such smooth muscle specifically being termed vascular smooth muscle) such as in the tunica media layer of large (aorta) and small arteries, arterioles and veins. It is divided into two subgroups; the single-unit (unitary) and multiunit smooth muscle. Within single-unit cells, the whole bundle or sheet contracts as a syncytium (i.e. a multinucleate mass of cytoplasm that is not separated into cells). Structure of the smooth musculature. The smooth muscle cell is 3-10 µm thick and 20-200 µm long. The cytoplasm is homogeneously eosinophilic and consists mainly of myofilaments. The nucleus is located in the center and takes a cigar-like shape during contraction. Functionally one differentiates between the single-unit and multi-unit type. The smooth muscle cells of the single-unit type are electrically connected by gap junctions and contract uniformly. This type of cells is found in the wall of internal organs and blood vessels (visceral smooth musculature). Smooth muscle is an involuntary non-striated muscle. It is divided into two subgroups; the single-unit (unitary) and multiunit smooth muscle. Within single-unit cells, the whole bundle or sheet contracts as a syncytium (i.e. a multinucleate mass of cytoplasm that is not separated into cells). SMOOTH MUSCLE-STRUCTURE. Smooth muscle (shown below) is made up of fusiform (diamond-shaped) cells with a single nucleus. The cells are arranged in sheets and contain three filament types: a) actin filaments with no troponin and tropomyosin (5 - 8 times more actin than skeletal muscle). Generally, smooth muscle has to be able to contract continuously at a low level of intensity. The structure of smooth muscle enables it to function in this manner and differentiates it from other types of muscle found in the heart and musculature of the arms, legs, back and trunk. The nucleus of a smooth muscle cell, which contains the DNA, is located in the center of the cell, where the cell is widest. In the vicinity of the nucleus are various organelles, which are individual structures with specific cell functions. Unlike Skeletal and Cardiac muscle tissue, Smooth muscle is. . Smooth muscle fibers are small and tapered-with the ends reducing in size, in contrast to the cylindrical shape of skeletal muscle. Each smooth muscle fiber has a single centrally located nucleus. : This page is part of the section about the structure and function of different Tissue Types, which is related to the section about Histology and Cells (incl. structure of animal cells, cell division, mitosis, meiosis). The structure of these muscle tissues can be described from the level of detail of the muscle fibres (muscle cells) through all the other muscle structures and parts of structures that bind muscle cells together enabling them to perform their functions. : This page is part of the section about the structure and function of different Tissue Types, which is related to the section about Histology and Cells (incl. structure of animal cells, cell division, mitosis, meiosis).
http://www.proteinatlas.org/learn/dictionary/normal/smooth+muscle http://www.intechopen.com/books/current-basic-and-pathological-approaches-to-the-function-of-muscle-cells-and-tissues-from-molecules-to-humans/structure-and-function-of-smooth-muscle-with-special-reference-to-mast-cells https://en.wikipedia.org/wiki/Smooth_muscle_tissue https://en.wikipedia.org/wiki/Smooth_muscle_tissue https://www.kenhub.com/en/library/anatomy/smooth-musculature https://en.wikipedia.org/wiki/Smooth_muscle_tissue http://www.qmu.ac.uk/hn/appliedscience/D%20Excitable%20Tissues/smooth_muscle.htm http://www.livestrong.com/article/261129-smooth-muscle-structure/ http://www.ivyroses.com/HumanBody/Tissue/Tissue_Muscular-Tissue.php http://www.ivyroses.com/HumanBody/Tissue/Tissue_Muscular-Tissue.php
what is smooth muscle structure