- The statement "Producing thrust causes an animal to move " is irrelevant

- Muscular movement helps animals move
- The muscular system contains muscles
- Therefore, the muscular system helps animals move

- The muscular system helps animals move
- The skeletal system is used to give structure for the body of animals
- Hence, in animals, the muscular system helps the body move and the skeletal system gives the body structure

- Microtubules in eukaryotic organisms help cells move
- Microfilaments in eukaryotic organisms give cells structure
- Hence, in eukaryotic organisms, microtubules help cells move and microfilaments give cells structure

- In animals, the muscular system helps the body move and the skeletal system gives the body structure
- In eukaryotic organisms, microtubules help cells move and microfilaments give cells structure
- Therefore, microtubules and microfilaments in eukaryotic organisms and the muscular system and skeletal system in animals both combine to help with movement and giving structure

- Microtubules and microfilaments in eukaryotic organisms and the muscular system and skeletal system in animals both combine to help with movement and giving structure
- If two things perform the same function then those two things are similar
- So, microtubules and microfilaments in eukaryotic organisms are similar the the muscular system and skeletal system in animals

So, microtubules and microfilaments in eukaryotic organisms are similar the the muscular system and skeletal system in animals
Question: In eukaryotic organisms, microtubules give cells structure, and microfilaments help the cell contract and move. Together, they combine to perform functions similar to what two human body systems?
Context: - The skeletal system is used to give structure for the body of animals 
- Muscular movement helps animals move 
- Producing thrust causes an animal to move 
- The muscular system contains muscles 
- Microtubules in eukaryotic organisms help cells move 
- If two things perform the same function then those two things are similar 
- Microfilaments in eukaryotic organisms give cells structure