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Related Concept Videos

Papillary Dermis01:11

Papillary Dermis

Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen and...
Reticular Dermis01:15

Reticular Dermis

The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
The Spinal Cord01:54

The Spinal Cord

The spinal cord is the body’s major nerve tract of the central nervous system, communicating afferent sensory information from the periphery to the brain and efferent motor information from the brain to the body. The human spinal cord extends from the hole at the base of the skull, or foramen magnum, to the level of the first or second lumbar vertebra.
Formation of Muscle Fibers from Myoblasts01:13

Formation of Muscle Fibers from Myoblasts

De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription factors...
Skeletal Muscle Anatomy00:55

Skeletal Muscle Anatomy

Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
Microscopic Anatomy of Skeletal Muscles01:13

Microscopic Anatomy of Skeletal Muscles

Skeletal muscle cells, also called muscle fibers, are distinctly elongated, multi-nucleated, slender biological units. They are packed with specialized structures designed to facilitate their primary function, which is contraction.
The muscle sarcolemma is a plasma membrane enclosing each muscle cell that conducts electrical signals called action potentials. The sarcolemma extends into the cell to form T-tubules, ensuring the neural impulses are uniformly distributed across the entire muscle...

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Related Experiment Video

Updated: Jul 13, 2026

Dissection of Drosophila melanogaster Indirect Flight Muscles for Microscopy Approaches
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Dissection of Drosophila melanogaster Indirect Flight Muscles for Microscopy Approaches

Published on: November 7, 2025

The teleost dermomyotome.

Frank Stellabotte1, Stephen H Devoto

  • 1Department of Biology, Wesleyan University, Middletown, Connecticut 06459, USA.

Developmental Dynamics : an Official Publication of the American Association of Anatomists
|July 27, 2007
PubMed
Summary

Recent research highlights the teleost dermomyotome, comparing it to amniotes. This comparison offers new insights into teleost muscle development and the broader vertebrate dermomyotome.

Area of Science:

  • Developmental Biology
  • Comparative Anatomy
  • Ichthyology

Background:

  • The dermomyotome, initially described in the 19th century, is a key embryonic structure.
  • Recent studies have revived interest in the teleost dermomyotome.
  • Amniote dermomyotomes are well-characterized, providing a comparative basis.

Purpose of the Study:

  • To review and compare the evidence for the teleost dermomyotome with that of amniotes.
  • To elucidate the morphogenesis and differentiation processes involving the dermomyotome in teleosts.
  • To identify signaling molecules regulating myotome growth from dermomyotome precursors.

Main Methods:

  • Comparative analysis of existing literature and evidence.
  • Review of primary myotome morphogenesis in teleosts.

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Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations
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Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations

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Last Updated: Jul 13, 2026

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Removal of Drosophila Muscle Tissue from Larval Fillets for Immunofluorescence Analysis of Sensory Neurons and Epidermal Cells
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Removal of Drosophila Muscle Tissue from Larval Fillets for Immunofluorescence Analysis of Sensory Neurons and Epidermal Cells

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Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations
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Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations

Published on: November 13, 2013

  • Examination of the relationship between primary myotome and dermomyotome.

    • Main Results:

    • Evidence for the existence and characteristics of the teleost dermomyotome is presented.
    • The dermomyotome contributes to axial muscle, appendicular muscle, and dermis differentiation.
    • Key signaling pathways regulating myotome growth are discussed.

    Conclusions:

    • Recognition of the teleost dermomyotome provides a novel perspective on teleost muscle development.
    • This work facilitates a deeper understanding of the vertebrate dermomyotome across species.
    • The study bridges a gap in the comparative anatomy of axial muscle development.