Cette leçon contient 11 diapositives, avec diapositives de texte et 2 vidéos.
La durée de la leçon est: 45 min
Éléments de cette leçon
Welcome!
Today:
Explanation about muscles (TB page 104)
Making exercises
Slide 1 - Diapositive
What are we going to learn today?
Today we are going to learn:
What muscles consist of.
How muscles work.
What kind of muscle tissues there are.
Slide 2 - Diapositive
Muscular system
To move, we don't only need synovial joints, but we also need muscles to move the bones. Muscles are connect with your bones by tendons, and they work by pulling a certain bone. Muscles can only pull a bone, so not push a bone.
Slide 3 - Diapositive
Muscles and tendons
Slide 4 - Diapositive
Antagonistic pair
As previously mentioned, muscles can only pull, and not push. That's why at least 2 muscles work together to enable a full movement. These are called antagonistic muscle pairs.
Slide 5 - Diapositive
Slide 6 - Vidéo
Involuntary muscles
Muscles that are connecter to your bones are part of the muscular system. However, there are also a lot of muscles in other organs. These muscles move involuntarily. Can you name a example of one?
Slide 7 - Diapositive
Muscle tissue
Depending on where you find certain muscle tissue, it can be build up differently.
Skeletal tissue: Very long and striped
Smooth muscle (involuntary): Looks less organised
Cardiac tissue: Is found in the heart, looks like a combination of the top two
Slide 8 - Diapositive
Muscle fibers
Skeletal muscles consists of two types of muscle fibers: fast-twitch and slow-twitch fibers.
Fast-twitch fibers work very quickly but are easily tired, whereas slow-twitch fibers need some time to work, but are not easily tired.
Slide 9 - Diapositive
Slide 10 - Vidéo
Homework for next lesson
The homework for next lesson are the exercises of paragraph 4.5. You can work on them now. You're allowed to whisper with your neighbours.
La durée de la leçon est: 45 min
