Chapter 13
Support & Locomotion
Locomotion - being able to move
place to place
Motile - describes an organism
performing locomotion
Sessile - describes an organism
that does not move; it is stationary
4 Advantages of Locomotion:
1. easier to get food
2. find suitable places to live
3. escape enemies/seek shelter
4. find mates and reproduce
Exoskeleton - outer skeleton
Endoskeleton - inner skeleton
made of bone and cartilage
Cartilage - type of connective
tissue that bends easily
Bone - connective tissue that is
hard and inflexible
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5 Purposes of Bones:
1. site to attach to muscles
2. give body shape
3. protect organs & spinal cord
4. stores minerals (calcium)
5. produce RBC & WBC
Ligaments - connective tissue that
holds bones together (between
joints)
Joints - point where bones meet
Tendons - holds skeletal
muscles to bones
*** Muscles can only move bones
when they contract; therefore,
they only pull bones. They work
together:
Flexor - muscle that bends and
flexes (bicep)
Extensor - muscle that
extends/straightens (tricep)
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