Locomotion

Locomotion

 

 

Locomotion is the ability to move through one's environment.  

What are the advantages of being motile?

 

 

 

 

There are different mechanisms by which organisms move.  Single celled creatures move by:

Image result for pseudopodia locomotion

 

Bigger organisms need something stiff (bones) and muscles to allow for movement.  Some organisms have their bones on the inside, some on the outside:

Image result for endoskeleton vs exoskeleton

 

What are the advantages of each?

 

 

 

Image result for endoskeleton vs exoskeleton

Image result for endoskeleton vs exoskeleton

 

 

 

These bones do more than just allow for movement.


What do bones do for us?

 

[make RBCs, WBCs, Platelets; protection; structure; store fat and minerals; allows movement; etc.]

 

 

Bones simplified:

Image result for human bones

Bones more complex:

Image result for human bones

Muscles simplified:

Image result for human muscles, elementary

Muscles more complex:

Image result for human muscles

 

 

Other connective tissue includes:


Cartilage - 

Tendons - 

Ligaments - 

 

Image result for human cartilage

Image result for human tendons and ligaments diagram

 

 

How do muscles contract?

Related image

Image result for sliding filament theory diagram

Image result for sliding filament theory diagram