Coloured TEM of a section through striated muscle

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Coloured TEM of a section through striated muscle

Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding- pattern of the muscle fibrils is seen. The fibrils run in parallel (from left to right) and between them runs sarcoplasmic reticulum that transmits nerve impulses to the fibrils. At top is a cell nucleus (purple). Within each fibril are contractile units called sarcomeres, separated by black lines. A sarcomere has protein filaments of myosin (red) and actin (green) that slide over each other, thereby causing the whole muscle to contract. Skeletal muscle is responsible for voluntary muscle movement in the body

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6420308

© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Actin Filament Muscles Sarcomere Skeletal Muscle Striated Muscle

EDITORS COMMENTS
This print showcases the intricate beauty of striated muscle at a microscopic level. In this coloured transmission electron micrograph (TEM), we are granted a glimpse into the inner workings of skeletal muscle. The striated banding pattern is prominently displayed, revealing the parallel arrangement of muscle fibrils running from left to right. Nestled between these fibrils lies the sarcoplasmic reticulum, acting as a conduit for nerve impulses that stimulate muscular contractions. At the top of this mesmerizing image, we observe a cell nucleus in regal purple hues, overseeing the bustling activity below. Within each individual fibril, an astonishing sight awaits – sarcomeres, contractile units responsible for generating movement and strength. These sarcomeres are separated by distinct black lines and consist of protein filaments known as myosin (depicted in vibrant red) and actin (captured in vivid green). These filaments expertly slide over one another during contraction, ultimately causing our muscles to flex and move. Skeletal muscles play an indispensable role in voluntary movements within our bodies. This remarkable photograph not only highlights their structural complexity but also serves as a testament to their vital function. As we marvel at this extraordinary display captured by Science Photo Library, let us appreciate the incredible orchestration required for even the simplest physical actions we perform every day.

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