Myofibrils Collection

Eye muscle, TEM C014 / 1468
Eye muscle. Transmission electron micrograph (TEM) of a section through a striated muscle cell from the ciliary muscle of a human eye

Heart muscle, confocal light micrograph
Heart muscle. Confocal light micrograph of a section through cardiac (heart) muscle. Cardiac muscle consists of branching elongated muscle cells

Muscle fibre structure, artwork
Muscle fibre. Computer artwork showing the structure of a muscle cell, also known as a muscle fibre. The cell is surrounded by a plasma membrane called the sarcolemma (cream)

Skeletal muscle, TEM C016 / 5369
Skeletal muscle. Transmission electron micrograph (TEM) of a cross section through human skeletal (striated) muscle. Blocks of muscle (lighter grey) are surrounded by connective tissue (black)

Cardiac muscle, TEM
Cardiac muscle. Coloured transmission electron micrograph (TEM) of cardiac muscle fibrils (orange)from a healthy heart. Mitochondria (pink) supply the muscle cells with energy

Cardiac muscle and capillary, TEM
Cardiac muscle. Coloured transmission electron micrograph (TEM) of cardiac muscle fibrils (purple)from a healthy heart. Mitochondria (green) supply the muscle cells with energy

Sugar uptake in muscles, diagram
Sugar uptake in muscles. Diagram showing sugar from a drink (upper right) being taken up by the muscles of the human body

Actin Myosin Muscle Model, artwork C014 / 2661
Computer artwork of the molecular actin myosin muscle structure. The complex ultrastructure of cells, their shape and internal structure

Neuromuscular junction, artwork
Neuromuscular junction. Computer artwork showing the juntion between a neuron (nerve cell, light blue) and a muscle cell, known as a neuromuscular junction

Eye muscle, TEM C014 / 1467
Eye muscle. Transmission electron micrograph (TEM) of a section through a striated muscle cell from the ciliary muscle of a human eye

Eye muscle, TEM C014 / 1466
Eye muscle. Transmission electron micrograph (TEM) of a section through a striated muscle cell from the ciliary muscle of a human eye

Actin Myosin Muscle Model, artwork C014 / 2658
Computer artwork of the molecular actin myosin muscle structure. The complex ultrastructure of cells, their shape and internal structure

Actin Myosin Muscle Model, artwork C014 / 2659
Computer artwork of the molecular actin myosin muscle structure. The complex ultrastructure of cells, their shape and internal structure

Actin myosin muscle model, artwork C014 / 2660
Computer artwork of the molecular actin myosin muscle structure. The complex ultrastructure of cells, their shape and internal structure

Human muscle fibres, diagram
Human muscle fibres. Diagram showing the structure of human muscles from the cellular to the macroscopic level. At lower right, muscle cells contain many myofibrils

Skeletal muscle fibre. Coloured scanning electron micrograph (SEM) of skeletal muscle fibre. This type of muscle is striated

Skeletal muscle, TEM
Skeletal muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through skeletal, or striated, muscle

Cardiac muscle. Coloured scanning electron micrograph (SEM) of heart (cardiac) muscle fibrils (yellow). The membrane around the muscle has been torn (yellow)

Smooth muscle, SEM
Smooth muscle. Coloured scanning electron micrograph of smooth muscle from the trachea (windpipe). Smooth muscle is not under voluntary control, unlike skeletal (striated) muscle

Striated muscle, SEM

Muscle fibres. Computer-enhanced confocal light micrograph of skeletal (striated) muscle fibres. Skeletal muscle is under the conscious control of the brain

Coloured SEM of human striated muscle
Striated muscle. Coloured scanning electron micrograph (SEM) of human striated muscle. Striated muscle occurs in all skeletal muscles and its movement is under voluntary control

Cardiac muscle, SEM
Cardiac muscle. Coloured scanning electron micrograph (SEM) of a bundle of cardiac muscle fibrils (green) from a healthy heart. Mitochondria (round, orange) supply the muscle cells with energy

Skeletal muscle fibres, SEM
Skeletal muscle fibres, coloured scanning electron micrograph (SEM). Endomysial connective tissue is green. Magnification: x300 when printed at 10 centimetres wide

Skeletal muscle fibre, SEM
Skeletal muscle fibre. Coloured scanning electron micrograph (SEM) of a section through a muscle fibre

Primate finger muscle, SEM

Muscle cell anatomy, artwork
Muscle cell anatomy. Artwork of the anatomy of a muscle cell, also known as a muscle fibre. The cell is surrounded by a plasma membrane called the sarcolemma (grey)

Muscle structure, artwork
Muscle structure. Computer artwork showing the protein structure of myofibrils and how they are bound together to form muscle fibres

Muscle anatomy, artwork
Muscle anatomy. Computer artwork of a cross-section through a skeletal muscle. Single muscle fibres (top right) are made up of many myofibrils surrounded by endomysium connective tissue (orange)

Muscle anatomy. Cutaway artwork showing the anatomy and internal structure of a muscle, from the macroscopic (left) to the microscopic (right) level

Muscle fibre, SEM
Muscle fibre. Coloured scanning electron micrograph (SEM) of a freeze-fractured skeletal (or striated) muscle fibre. The fracturing of the fibre has revealed that it consists of a bundle of smaller

Heart muscle fibres, SEM
Heart muscle fibres. Coloured scanning electron micrograph (SEM) of cardiac muscle fibrils (pink) from a healthy heart. The muscle fibrils, or myofibrils

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Myofibrils: The Powerhouses of Muscle Contraction From the intricate eye muscles to the mighty heart muscle, myofibrils play a crucial role in our body's movement and function. These microscopic structures are responsible for generating force and enabling us to perform various activities. In the eye muscle, as seen through TEM C014 / 1468, myofibrils form a complex network that allows precise control over our vision. Similarly, in the confocal light micrograph of the heart muscle, we witness how myofibrils contribute to its rhythmic contractions. The artwork depicting muscle fiber structure showcases the organized arrangement of these contractile units within skeletal and cardiac muscles. Through TEM images like those of cardiac muscle and capillary or skeletal muscle (TEM), we gain insight into their detailed architecture at a cellular level. But what fuels these incredible machines? Diagrams illustrating sugar uptake in muscles reveal how glucose is transported into myofibrils to provide energy for contraction. This vital process ensures smooth functioning during physical activity. Artwork such as Actin Myosin Muscle Model (C014 / 2661) helps visualize how actin and myosin filaments interact within myofibrils to generate force. Their coordinated movements create muscular contractions necessary for everyday tasks. Another fascinating aspect is revealed through artwork showcasing neuromuscular junctions - where nerves meet muscles. This connection enables communication between neurons and myofibrils, allowing precise control over movement. As we delve deeper into understanding these remarkable structures, TEM images like Eye Muscle (C014 / 1467) and Eye Muscle (C014 / 1466) showcase their unique features specific to ocular functions. Whether it be powering our eyesight or ensuring our hearts beat steadily, myofibrils prove themselves indispensable time after time. With each new discovery aided by advanced imaging techniques like TEM or artistic representations highlighting their complexity, we continue to unravel the mysteries of these microscopic powerhouses.