the animal kingdom nancy g. morris volunteer state community college
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The Animal Kingdom
Nancy G. MorrisVolunteer State Community College
General Characteristics:(Outcome #1)
Exhibit multicellular construction Composed of eukaryotic cells Nutrition is by ingestion Animals differ from plants
• Contain centrioles & asters• Lack chlorophyll, plastids, cell
walls• Exhibit both embryonic and larval
stages• Exclusively heterotrophic
General Characteristics:
Complex organisms have up to 10 systems
1) Skeletal2) Muscular*
3) Endocrine * Unique to animals
4) Nervous*
5) Circulatory6) Lymphatic7) Integumentary8) Reproductive9) Excretory10)Respiratory11)Digestive
General Characteristics: Adult form may be viewed as a
complex tube within a tube
Reflected by the presence of 3 primary germ layers:– Ectoderm – integument &
nervous– Mesoderm – all other systems– Endoderm – digestive
General Characteristics: Reflected by the presence of 3 primary
germ layers:– Ectoderm – integument & nervous– Mesoderm – all other systems– Endoderm – digestive
Triploblastic – possess all 3 germ layers
Diploblastic – possess only 2 germ layers
General Characteristics:
Exhibit the Exhibit the Diplontic Life Diplontic Life CycleCycle(sexual reproduction)
• Adult 2N• Gamete 1N• Zygote 2N
Adult
2N
Zygote
2N
egg 1N
sperm 1N
mitosis
meiosis
Broad Broad ClassificationClassification
Animal Classification includes (Outcome #2)
Broad ClassificationBroad Classification
• in addition to the seven taxa employed in the other kingdoms
• between kingdom and phylum
• based on these characteristics:
Broad Classification
1) Level of Organization 2) Type of Body
Symmetry 3) Type of Body Cavity 4) Embryonic
Development
Level of OrganizationLevel of Organization
IF the cell develops from a single cell to the tissue level only, it belongs to
Subkingdom ParazoaParazoa (beside the animals)
Phylum PoriferaPhylum Porifera - sponges
(to bear pores)
Level of OrganizationLevel of Organization
All others develop to an organ or organ system level:
Subkingdom EumetazoaEumetazoa
(true later animal)
1. Only sponges lack symmetry (asymmetrical)
2. Organisms whose body parts are organized around a central axis and radiate from the central core like the spokes of a wheel exhibit radial symmetry. (Think of an orange.)
3. Organisms whose body parts are arranged along a longitudinal axis where right and left half are mirror images of each other exhibit bilaterial symmetry. (Think of a butterfly.)
Type of Body SymmetryType of Body Symmetry
Type of Body SymmetryType of Body Symmetry
Radially symmetrical organisms belong to
Grade Grade RadiataRadiata
Type of Body SymmetryType of Body Symmetry
Bilaterally symmetrical organisms belong to
Grade Grade BilateratBilaterataa
Type of Body SymmetryType of Body Symmetry
Grade Radiata
larva, ancestors, AND adults are radially symmetrical
Phylum Cnidaria - jellyfish
Another typical Cnidarian: Hydra
Cnidarian formsCnidarian forms
Type of Body SymmetryType of Body Symmetry
Grade Bilaterata
larva, ancestors, OR adults are bilaterally symmetrical
All others belong to the
Type of Body Cavity Type of Body Cavity (coelom)(coelom)
Subgrade Acoelomata
Phylum Platyhelminthes -the flatworms
NO body cavity Solid layer of mesoderm
ectoderm
solid mesoderm
endoderm
gut
Type of Body Cavity Type of Body Cavity (coelom)(coelom)
Subgrade Pseudocoelomata
Phylum Nematoda -the roundworms
False cavity (false coelom) Pseudocoel only partially lined w/
mesoderm Endoderm
Ectoderm w/ mesoderm lining
Pseudocoel
Gut
Type of Body Cavity Type of Body Cavity (coelom)(coelom)
Subgrade Coelomata
Phyla Annelida Chordata True body cavity Coelom completely lined with
mesoderm ectodermCoelom (completely lined with mesoderm) endoderm gut
Body plans of bilaterata Body plans of bilaterata
Embryonic Development/ formation of the archenteron
Type of Embryonic Type of Embryonic DevelopmentDevelopment
If the first opening into the blastocoel is the mouth, the organism is a
Protostome.
Type of Embryonic Type of Embryonic DevelopmentDevelopment
If the second opening into the blastocoel formed is the mouth, the organism is a
Deutrostome.
AA
familfamily y
treetree
Practice: Practice: A Map to the A Map to the AnimalAnimal KingdomKingdom
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