Page 19 - SAAT BIOLOGY PART 1

SAAT BIOLOGY MR.MOHAMED ELGAYAR MRPROF.NET
The clitellum is found in both earthworms and leeches.

• Arthropods

• The pedipalps are enlarged and modified in male

spiders to transfer sperm to the female.

• Both arthropods and annelids are segmented.

• Most crustaceans, such as lobsters and crayfish, have

swimmerets, appendages that are used as flippers

during swimming.

• Arachnids have two body segments and six pairs of

jointed appendages: four pairs of legs, chelicerae, and

pedipalps.

• The exoskeleton provides a framework for support,

protects soft tissues, slows water loss, and provides a

place for muscle attachment. The exoskeleton does not

produce amino acids.

MRPROF.NET MR.MOHAMED ELGAYAR MRPROF.NET@GMAIL.COM 18