Lesson 1 - SUPPORT SYSTEMS IN ANIMALS - Brebner High School

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HYDROSTATIC SKELETONENVIRONMENT:• Ideal for animals in a aquatic environmentADVANTAGES:• Provide support for crawling and burrowing• Act as cushion against shocks• Protect internal organsDISADVANTAGE• Cannot provide support for movements such as running and walkingwhere body is held of the ground

GRADE 11 BUSINESS STUDIES - Brebner High School

CONSISTS OF:EXOSKELETON• A hard case formed outside the body and hard outer coveringsMolluscs – shells of snails• Mainly calcium carbonate (calcereous)Arthropods – crabs, millipedes and insects• Hardened by a cuticle that is secreted by the epidermis ofthese animals• The cuticle consists mainly of chitin (polysaccharide similar tocellulose)

Page 2: TYPES OF SKELETONS• Hydrostatic s
Page 6 and 7: Types of skeleton• Some animals m
Page 10 and 11: EXOSKELETONMOVEMENT:• Muscles are
Page 12: ENDOSKELETONCONSISTS OF:• Hard su
Page 15 and 16: ENDOSKELETONDISADVANTAGES• Parts

Lesson 1 - SUPPORT SYSTEMS IN ANIMALS - Brebner High School

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