ANAT2241 Muscle Tissue: Difference between revisions
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* A group of individual myofibres within a muscle will be innervated by a single motor neuron (motor unit). | * A group of individual myofibres within a muscle will be innervated by a single motor neuron (motor unit). | ||
* The electrical properties of the motor neuron will regulate the contractile properties of all associated myofibres. | * The electrical properties of the motor neuron will regulate the contractile properties of all associated myofibres. | ||
==Cardiac Muscle Histology== | |||
{| | |||
| [[File:Cardiac_muscle_histology.jpg]] | |||
Cardiac muscle histology | |||
| Image of primate heart stained with Alizarin blue. | |||
* Red Blood Cells (orange cells) Cardiac Muscle Cells (blue) | |||
* Cardiac muscle cells are cut longitudinally. | |||
* At high magnification see both striations and the large nuclei of the cardiac muscle cells. | |||
* Follow the course of individual cardiac muscle cells and note fine, dark blue lines which seem to cross (traverse) the fibres. | |||
* '''Intercalated Discs''' that connect the individual muscle cells and permit the conduction of electrical impulses between the cells. | |||
** seen in longitudinal sections. | |||
|} | |||
[[File:Heart_histology_002.jpg]] [[File:Heart_histology_004.jpg]] | |||
[[File:Heart_histology_003.jpg]] [[File:Heart_histology_001.jpg]] | |||
===Unlabeled Images=== | |||
<gallery> | |||
File:Heart_histology_101.jpg | |||
File:Heart_histology_102.jpg | |||
File:Heart_histology_103.jpg | |||
File:Heart_histology_104.jpg | |||
File:Heart_histology_105.jpg | |||
File:Heart_histology_106.jpg | |||
File:Heart_histology_107.jpg | |||
</gallery> | |||
Revision as of 13:00, 16 February 2013
ANAT2241 This practical support page content is not part of the virtual science practical class and provides additional information for student self-directed learning purposes. All practical class pages are located on Moodle - ANAT2241 |
Aims
Currently a template page - this notice removed when complete.
Skeletal muscle structure cartoon | Skeletal muscle sarcomeres |
Skeletal Muscle Histology
- Muscle Histology: Muscle Development | Human HE x4 longitudinal and transverse | Human HE x40 transverse | Human HE x40 longitudinal | Human HE x40 longitudinal | Human HE x4 longitudinal and transverse | Muscle Spindle HE x40 | Human HE x40 | Human HE x40 | Human HE x40 | Human HE x100 | Human HE x100 | Fetal human muscle | Myotendinous junction label | Myotendinous junction HE x40 | Whipf 1 | Whipf 2 | Whipf 3 | Tongue HE x10 transverse | Tongue x100 | Muscle spindle HE x20 | Muscle spindle HE x40
Muscle Contraction
Individual myoblasts in the developing muscle bed initial fuse together to form multi-nucleated myotubes. These myotubes then express the contractile proteins, that are organized into sarcomeres in series along the length of the myotube.
This animation shows the molecular interactions that occur within the skeletal muscle sarcomere between actin and myosin during skeletal muscle contraction.
Muscle Fibre Types
Muscle fiber types
- type IIB, IIA, IIX, and I fibres - based only on the myosin ATPase activity.
- Type I fibres appear red, due to the presence of myoglobin.
- Type II fibres appear white, due to the absence of myoglobin and their glycolytic nature.
- A group of individual myofibres within a muscle will be innervated by a single motor neuron (motor unit).
- The electrical properties of the motor neuron will regulate the contractile properties of all associated myofibres.
Cardiac Muscle Histology
Unlabeled Images
Smooth Muscle Histology
- Smooth Muscle Histology: Labeled Colon low | Labeled Colon high | Colon x40 | Colon x40 | Ileum x10 | Oesophagus x10 | Seminiferous tubule x40 | Uterus myometrium x10 | Uterus myometrium x40 |
Gastrointestinal Tract Wall
The gastrointestinal tract consists of two thick outer muscle layers (longitudinal and circular) and a thin muscularis mucosa layer.
Course Links
- Histology Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ANAT2241 Support | Histology | Histology Stains | Embryology Glossary
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Practical Support
- Pages can be accessed from any internet connected computer.
ANAT2241 Support Links: The Virtual Microscope | Covering and Lining Epithelia | Glandular Epithelia | CT Components | CT Types | Bone, Bone Formation and Joints | Muscle | Nervous | Blood | Eye | Cardiovascular | Respiratory | Integumentary | Gastrointestinal | Gastrointestinal Organs | Lymphatic and Immune | Endocrine | Urinary | Female Reproductive | Male Reproductive | Histology Stains | Histology Drawings | Practicals Health and Safety 2013 | Moodle - 2019
ANAT2241 This practical support page content is not part of the science practical class and provides only background information for student self-directed learning purposes.
Cite this page: Hill, M.A. (2024, March 29) Embryology ANAT2241 Muscle Tissue. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/ANAT2241_Muscle_Tissue
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G