![تويتر \ William Morrison, MD على تويتر: "Nice demonstration of the pennate (feather-like) pattern of muscle structure ... and where the word 'pen' comes from! https://t.co/KHd1FRvgzP" تويتر \ William Morrison, MD على تويتر: "Nice demonstration of the pennate (feather-like) pattern of muscle structure ... and where the word 'pen' comes from! https://t.co/KHd1FRvgzP"](https://pbs.twimg.com/media/DBP8MNyUAAEkq1Y.jpg)
تويتر \ William Morrison, MD على تويتر: "Nice demonstration of the pennate (feather-like) pattern of muscle structure ... and where the word 'pen' comes from! https://t.co/KHd1FRvgzP"
![Contractile features for parallel and pennate blocks of muscle during... | Download Scientific Diagram Contractile features for parallel and pennate blocks of muscle during... | Download Scientific Diagram](https://www.researchgate.net/publication/343992192/figure/fig4/AS:934361855688704@1599780634140/Contractile-features-for-parallel-and-pennate-blocks-of-muscle-during-fixed-end.png)
Contractile features for parallel and pennate blocks of muscle during... | Download Scientific Diagram
![Stress, strain and strain-energy potentials for parallel and pennate... | Download Scientific Diagram Stress, strain and strain-energy potentials for parallel and pennate... | Download Scientific Diagram](https://www.researchgate.net/publication/343992192/figure/fig5/AS:934361855692800@1599780634197/Stress-strain-and-strain-energy-potentials-for-parallel-and-pennate-blocks-of-muscle.png)