Download Unit 10: Classification

Unit 8: Animals (Phylum Mollusca, Arthropoda, Echinodermata)
23.4 Phylum Mollusca
- ex: ________________, ________________, _______________
1) Structures
 _______________
 _______________
 soft bodies divided into 4 parts:
1) ______________
 contains digestive and excretory organs, and the heart
2) ____________
 fleshy layer covering __________________
 secretes ______________
3) ____________
 usually located on the _____________ side
 may be modified in different mollusks for different functions (usually
________________)
4) _____________
 serve as an ________________ to protect the soft bodies
 secreted by _____________
 found in most mollusks
2) Feeding
- ________________ digestive system
- all mollusks (except bivalves) have a _____________ = rasping
__________________ structure located in the mouth, covered with thousands of
pointed, backward curving _________________ arranged in rows
3) Excretion
- _____________ filter out wastes  stored in ____________  then released
through _____________
4) Circulation
- ___________ circulatory system = blood ________ continuously retained in vessels
- blood leaves vessels and washes over tissues in areas called _______________
- have ______________
- __________________ = helps carry O2 around the body
5) Cephalization
- some have very advanced nervous system with _________________
6) Endocrine System
- composed of ____________ that secrete ______________
7) Classification
_____________
______________
________________
__________________
- Class Polyplacophora
 ex: _____________
 live on ____________________ in intertidal area
 attaches to rocks with muscular ______________
 shell consists of _________________
 feeds by ______________________ from rocks using its _________________
- Class Gastropoda
 ex: ______________, _____________
 large flat ___________________
 one piece ____________________ (if present)
 _________________ with _________ on stalk
 feed with a _______________
 ______________, scavengers, _________________
 ________________ and ________________
- Class Bivalvia
 ex: __________, mussels, _____________, oysters
 __________________ connected by _______________ acting as a hinge
 tentacles and radula are ______________
 foot is modified for burrowing in ____________ or _____________
 ____________________; __________ filter food from water
- Class Cephalopoda
 ex: ___________, octopus, _________________
 most _________________________; most _________________ of all invertebrates
 most lack _____________________, but have internal shell called ____________
 foot is modified into _______________ with ______________
 larger ____________ and __________ (similar to vertebrate eyes)
24.1 Phylum Arthropoda
 Arthropods are the most diverse of all animals.
- ex: ________________, ________________, _______________
1)Structures
_______________
_______________
________________________ = extensions of the body including legs and antennae
_______________
 a pair of ________________ is usually attached to each segment
 __________________ = hard external covering for ____________ and ____________
 made of ____________
 _________________________ as body enlarges
 is shed periodically= __________________
 body is usually divided into ____ body segments:
 ____________, _______________, _______________
 some have ______________________ (head+thorax)




2) Digestion
- _______________ digestive system
3) Excretion
- _____________________; ____________________________
4) Circulation
- ___________ circulation = blood drains into ___________
5) Respiration
- most respire through ____________ = network of ________________ that carry _____
directly to the cells
- some have ___________________ = made of many thin, hollow __________ like
pages of a book
- air enters through pores called ________________
- some have ______________ for gas exchange in water
6) Cephalization
- _____________ and nerves; ______________ and antennules
- most have compound eyes made of many lenses
- highly sensitive to ____________, good at detecting _____________, can form only
____________ images
7) Classification
– Subphylum
 Trilobita – extinct organisms
 Crustacea – crayfish, lobster, pillbugs
 Chelicerata – spiders, scorpions, ticks, mites (specialized in _________________
mouthpart = _______________)
 Myriapoda – centipedes and millipedes (__________ bodies and _________ pairs
of legs)
 Hexapoda – the insects (live on ___________; have ________ legs)
24.2 Crustaceans

Crustaceans evolved as marine arthropods.
- ex: ________________, ________________, _______________
- __________________, abdomen
- Appendages include claws, ____________, walking legs, ______________, and
______________
- antennules/antennae= _____________,taste,______________
- _____________= claws to catch food & for defense
- swimmerets= _______________ and swim
- uropods= used for swimming
24.3 Arachnids
 Class Arachnida
– ex: _________________
–
–
–
–
–
–
_____________________ and abdomen
respire through ______________ and ________________
________________= produces threads for _____________, protecting _______,
catching ___________
_______________= mouth parts modified into ___________ or _____________ (1st pair
of append.)
________________= catch ____________ (2nd pair of append.)
release __________________ to digest prey and suck it in
24.4 Insects
 Class Insecta
– ex: _________________, ____________, cockroaches
– ______________= study of insects
– _____________, _____________, _______________
– thorax may have a pair of ______________
– most successful of all animals:
 _________________
 high rate of _________________
 capable of _____________
 can occupy almost any type of _________________
 ________________________= change from juvenile to adult form
 complete:
egg  ____________ (wormlike)  __________ (cocoon)  adult
 incomplete:
egg  ____________ (wingless miniature adult)  adult
___________________________
______________________________
23.6 Phylum Echinodermata
- ex: ________________, ________________, sand dollars, _______________, sea lilies
1) Structures
 _______________ symmetry in adults (body parts in groups of _____); larvae have
_______________ symmetry
 _______________
 ____________________; on the same evolutionary branch as _________________
 _____________ skin
 ___________________ (internal skeleton)
 __________________________ = water-filled system of interconnected
___________ and _________________ (tiny _________________)
– Water flows through canals causing a _____________ so organism can move and
attach to surfaces using ___________________
2) Digestion
– Sea stars feed on _____________
– ________________ pry shells open slightly and _______________ is pushed
through crack into clam
– Food is ______________ and _____________ and stomach is ______________
– Wastes pass through ___________ located on ______________ side
3) Circulation
– ___________________________ and coelomic fluid circulate gases and materials
4) Respiration
– Gases are exchanged through walls of __________________ and through
_______________ = projections that extend through the endoskeleton into sea
water
5) Cephalization
– Simple _________________ around center with ___________________ extending
down each arm
6) Reproduction
– Release eggs and sperm into ____________
– Fertilized eggs become ______________ with _____________ symmetry
– Most echinoderms can ________________ lost body parts