1. Support and Locomotion The skeletal and muscular systems

2. Locomotion The ability to move from place to place Motile Remember, organisms that can not move are stationary or sessile.

3. Why Move? Easier to obtain food Easier to find a suitable place to live Escape from predators Reproduction and finding a mate

4. Locomotion generally requires… A muscular system and a skeletal system

5. 2 types of skeletal systems Endoskeleton- –Bone and cartilage inside body walls –Examples) vertebrates like us Exoskeleton- –Hard outer material made of calcium or chitin –Examples) clams, oysters, insects, crabs, spiders

6. Endoskeleton Exoskeleton

7. Locomotion in Protist-a review Ameba Paramecium Euglena Pseudopods Cilia Flagella

8. Paramecium Ameba Euglena

9. Human Skeletal System Made of : –Bone –Cartilage –Ligaments –Tendons

10. Bone-”osteo-” Connective tissue that is hard and inflexible Site of attachment for muscles Gives body shape and support Protection Storage for minerals (calcium, phosphorus) Produces blood cells

11. Diagram of Human Skeletal System

12. Cartilage Connective tissue able to bend Embryos have skeletons of cartilage –Turns to bone by ossification after birth Function: Cushions against impact or pressure

13. Joints Points where bones meet

14. Ligaments Connective tissue holding bones of a joint together

15. Tendons Connective tissue attaching muscle to bone

16. The muscular system Three types of muscle –Skeletal –Smooth –Cardiac

17. Skeletal Muscle Used for voluntary movements Has a striated or striped appearance

18. Smooth Muscle Used for automatic, involuntary movements Ex) walls of alimentary canal, diaphragm

19. Cardiac Muscle Heart muscle Involuntary Striped appearance