Visit: ViralEd on youtube for more videos Explore the Muscular system in more detail with this part 2 video. This video explains in a fun and educational way the more complex functions of the muscular system and who these can affect sporting performance. Explains the roles of fast-twitch and slow-twitch fibres, while looking at what else happens to the muscles within the body when exercising. In this video, we discuss in detail: - Muscle fibres - 2 types of skeletal fibres - Muscle speed and performance - What happens when we exercise? Vocabulary in this video includes slow-twitch, fast-twitch, muscle fibres, cardiac, skeletal and smooth muscles. Our videos are designed to introduce basic concepts and hopefully to inspire students to stay curious about the content. We simply cannot include all of the exceptions and minute details in a video under 10 minutes, and this is why we so frequently remind people of this in our videos. We recommend that people watching these videos continue to search for further information to even greater their education and learning.