Biology SL
4
Chapters
553
Notes
Theme A - Unity & Diversity
Theme B - Form & Function
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Biology SL
Theme B - Form & Function
Discover The Magic Of Intercostal Muscles In Breath & Movement!
360 words
2 mins read
Last edited on 14th Jun 2024
Table of content
Meet the dynamic duo - internal & external intercostal muscles! 🦸♀️
- Location: Sandwiched between your ribs. Not like peanut butter & jelly, but you get the idea! 🥪
- Two types
- External Intercostal Muscles: The "Breath-IN" squad! 🌬️
- Internal Intercostal Muscles: The "Breath-OUT" squad! 🌪️
Special features 🌟
- They're antagonistic, which in this context doesn't mean they're enemies. It means one acts opposite to the other.
- Their muscle fibers run in different directions. Imagine the external ones being like the rungs on a ladder, and the internal ones like diagonal stripes on a candy cane!
Action time - inhale & exhale adventures 💪
-
Inhale
- External intercostal muscles do a power move and contract.
- This expands the ribcage (like an umbrella opening up). 🌂
- Internal intercostal muscles stretch out, kind of like a rubber band being pulled.
- This stretching stores some cool energy thanks to a protein called titin. (Imagine a spring being loaded!)
-
Exhale
- Time for the internal intercostal muscles to shine. They contract!
- Ribcage becomes smaller, kind of like when you let go of a blown-up balloon. 🎈
- External intercostal muscles get their turn to stretch.
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Biology SL
Theme B - Form & Function
Discover The Magic Of Intercostal Muscles In Breath & Movement!
360 words
2 mins read
Last edited on 14th Jun 2024
Table of content
Meet the dynamic duo - internal & external intercostal muscles! 🦸♀️
- Location: Sandwiched between your ribs. Not like peanut butter & jelly, but you get the idea! 🥪
- Two types
- External Intercostal Muscles: The "Breath-IN" squad! 🌬️
- Internal Intercostal Muscles: The "Breath-OUT" squad! 🌪️
Special features 🌟
- They're antagonistic, which in this context doesn't mean they're enemies. It means one acts opposite to the other.
- Their muscle fibers run in different directions. Imagine the external ones being like the rungs on a ladder, and the internal ones like diagonal stripes on a candy cane!
Action time - inhale & exhale adventures 💪
-
Inhale
- External intercostal muscles do a power move and contract.
- This expands the ribcage (like an umbrella opening up). 🌂
- Internal intercostal muscles stretch out, kind of like a rubber band being pulled.
- This stretching stores some cool energy thanks to a protein called titin. (Imagine a spring being loaded!)
-
Exhale
- Time for the internal intercostal muscles to shine. They contract!
- Ribcage becomes smaller, kind of like when you let go of a blown-up balloon. 🎈
- External intercostal muscles get their turn to stretch.
Unlock the Full Content!
Dive deeper and gain exclusive access to premium files of Biology SL. Subscribe now and get closer to that 45 🌟