Locomotion Topic 14
Locomotion Locomotion: the ability to move from place to place Motile: able to move Sessile: unable to move
Advantages of Motility Obtain food Migrate Find shelter Escape predators Mating
Exoskeleton Outside Made of CHITIN Shell does not grow Animals must molt, remove old shell and grow new shell
Horseshoe Crab Molting http://www.youtube.com/watch?v=Daz8nkh-pWM
Endoskeleton Inside Made of bone and cartilage Mammals, reptiles, amphibians, & birds
Cartilage Connective Tissue Soft and Flexible Found in: Ears Nose Larynx Trachea Between Vertebrae
Joints Places where bones meet Types: Immovable Hinge Ball & Socket Pivot Gliding
Ligaments- attach bone to bone Tendons- attach muscle to bone
Skeletal Muscle Voluntary Attach to skeleton Work in pairs
Visceral Muscle Involuntary Lining of digestive tract & blood vessels aka SMOOTH MUSCLE Involuntary Lining of digestive tract & blood vessels
Cardiac Muscle Involuntary Found in Heart ♥