P.7 SCIENCE NOTES 2023.pdf

PREPARED BY MUTAKA SEMU 0705229363/ 0771433657 PRIMARY SEVEN SCIENCE TERM ONE • Endo skeleton • Exo skeleton • Hydrostatic skeleton End skeleton • A skeletal system is a system that supports the body of an animal. PREPARED BY MUTAKA SEMU 0705229363/ 0771433657 TOPIC: SKELETAL AND MUSCULAR SYSTEM Qn. Give examples of animals that have an endo skeleton. Qn. What is a skeletal system? THEME: HUMAN BODY • An endo skeleton is a type of skeleton found inside the body of an animal. • A skeleton is the structure that supports the body of an animal. Qn. What is a skeleton? • Human beings / people • Cows • Dogs • Cats • Goats • Lions • Elephants • Tiger Qn. What is an endo skeleton? Qn. Mention the types of skeleton. Qn. What is a hydrostatic skeleton? • Insects e.g. mosquitoes, houseflies. • Arachnids e.g. spider, scorpion. • Myriapods e.g. centipedes, millipedes. • Crustaceans e.g. crab , lobster Qn. What is an exo skeleton? • Snails • Slugs • Worms • Star fish • Jelly fish • Caterpillars • Sea urchins. PREPARED BY MUTAKA SEMU 0705229363/ 0771433657 • Moulting is the periodic loss of cuticles from arthropods. Qn. How do animals with an exo skeleton increase in size or grow? Qn. Identify examples of animals with a hydrostatic skeleton. • By moulting or ecdysis Hydrostatic skeleton • An exo skeleton is a type of skeleton found outside the body of an animal. Exo skeleton Qn. Give examples of animals with an exo skeleton • A hydrostatic skeleton is a type of skeleton where the body of an