Myoblast

Myoblast
Myoblast
Latin myoblastus
MeSH Myoblasts
Code TH H2.00.05.2.03004

A myoblast is a type of embryonic progenitor cell that gives rise to muscle cells (myocytes).[citation needed]

The muscle cells can be skeletal muscle, smooth muscle, and cardiac muscle.[1]

Skeletal muscle fibers are made when myoblasts fuse together; muscle fibers therefore have multiple nuclei (each nucleus originating from a single myoblast). The fusion of myoblasts is specific to skeletal muscle (example: biceps) and not cardiac muscle or smooth muscle.

Within the muscle fiber (myocyte), there are bundles of myofibrils which are composed of a series of sarcomeres. Sarcomeres are the basic contractile units which consist of thin and thick filaments. Thin filaments are actin filaments and thick filaments consist of an arrangement of myosin proteins. The sarcomere does not contain organelles or a nucleus.

Myoblasts that do not form muscle fibers dedifferentiate back into satellite cells. These satellite cells remain adjacent to a muscle fiber, situated between the sarcolemma and the endomysium (the connective tissue investment that divides the muscle fascicles into individual fibers).

See also

References

  1. ^ MeSH Myoblasts

External links

v · d · eHuman cell types / list derived primarily from mesoderm
Paraxial

bone: Osteoblast → Osteocyte

cartilage: Chondroblast → Chondrocyte

Fibroblast → Fibrocyte

muscle: Myoblast → Myocyte · Myosatellite cell · Tendon cell · Cardiac muscle cell

adipose: Lipoblast → Adipocyte
Digestive system
Intermediate

Angioblast → Endothelial cell · Mesangial cell (Intraglomerular, Extraglomerular) · Juxtaglomerular cell · Macula densa cell

Stromal cell → Interstitial cell → Telocytes

Simple epithelial cell → Podocyte · Kidney proximal tubule brush border cell
Sertoli cell · Leydig cell · Granulosa cell · Peg cell · (spermatozoon and ovum are germ cells)
Lateral plate/
hemangioblast
Blood/immune
(HSC)
see lymphocytes
see myeloid cells

M: BON/CAR

anat(c/f/k/f, u, t/p, l)/phys/devp/cell

noco/cong/tumr, sysi/epon, injr

proc, drug(M5)

M: URI

anat/phys/devp/cell

noco/acba/cong/tumr, sysi/epon, urte

proc/itvp, drug (G4B), blte, urte

M: VAS

anat(a:h/u/t/a/l,v:h/u/t/a/l)/phys/devp/cell/prot

noco/syva/cong/lyvd/tumr, sysi/epon, injr

proc, drug(C2s+n/3/4/5/7/8/9)
v · d · eHistology: muscle tissue (TH H2.00.05, H3.3)
Smooth
muscle
Striated
muscle
Costamere/
DAPC
Membrane/
extracellular
Intracellular

Dystrophin · Dystrobrevin (A, B) · Syntrophin (A, B1, B2, G1, G2) · Syncoilin · Dysbindin · Synemin/desmuslin

related: NOS1 · Caveolin 3
Sarcomere/
(a, i, and h bands;
z and m lines)
General
Both
Fiber
Cells
Other
Desmin · Sarcoplasm · Sarcolemma (T-tubule) · Sarcoplasmic reticulum
Other/
ungrouped

M: MUS, DF+DRCT

anat (h/n, u, t/d, a/p, l)/phys/devp/hist

noco(m, s, c)/cong(d)/tumr, sysi/epon, injr

proc, drug (M1A/3)

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Look at other dictionaries:

  • myoblast — [mī′ō blast΄] n. a small embryonic cell that develops into a muscle cell myoblastic adj …   English World dictionary

  • Myoblast — Ein Myoblast (von griechisch μῦς, mys „Muskel“, βλάστος, blastos „Keim“), auch Sarkoblast (griech. σάρξ, sárx „Fleisch“), ist eine spindelförmige Vorläuferzelle der Skelettmuskelfasern beim Embryo. Myoblasten entwickeln sich aus Prämyoblasten im… …   Deutsch Wikipedia

  • Myoblast city — (Mbc[1]) is the Drosophila melanogaster ortholog of the mammalian protein Dock180.[2] Mutant mbc embryos exhibit defects in dorsal closure, cytoskeletal organization, myogenesis, and neural development.[2][ …   Wikipedia

  • myoblast — noun Etymology: International Scientific Vocabulary Date: 1884 an undifferentiated cell capable of giving rise to muscle cells …   New Collegiate Dictionary

  • myoblast — n. [Gr. mys, muscle; blastos, bud] A cell that produces muscular fiber …   Dictionary of invertebrate zoology

  • myoblast — Cell that by fusion with other myoblasts gives rise to myotubes that eventually develop into skeletal muscle fibres. The term is sometimes used for all the cells recognisable as immediate precursors of skeletal muscle fibres. Alternatively, the… …   Dictionary of molecular biology

  • myoblast — /muy euh blast /, n. Embryol. any of the cells derived from the mesoderm in the vertebrate embryo that develop into muscle tissue. [1880 85; MYO + BLAST] * * * …   Universalium

  • myoblast — noun an undifferentiated stem cell that develops into muscle tissue …   Wiktionary

  • myoblast — A primitive muscle cell with the potentiality of developing into a muscle fiber. SYN: sarcoblast, sarcogenic cell. [myo + G. blastos, germ] * * * myo·blast mī ə .blast n an undifferentiated cell capable of giving rise to muscle cells * * * n …   Medical dictionary

  • Myoblast — My|o|blạst, der; en, en <meist Pl.> [zu griech. blastós = Spross, Trieb] (Med.): Bildungszelle der Muskelfasern …   Universal-Lexikon

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