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Biology Gr11 > Animals > Flashcards

Animals Flashcards

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1
Q

Key features of animals

A

Body symmetry and cephalisation
Coelom
Opening in gut and blood systems
Tissue layers

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2
Q

What are the 3 types of symmetry

A 
Asymmetry 
Radial symmetry(same all round)
Bilateral symmetry
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3
Q

Tissue layers include

A

Ectoderm:epithelial layer and nerve system
Endoderm:wall of digestive system
Secondary germ layer :mesoderm

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4
Q

Why is the mesoderm important

A

Mesoderm forms chyme which reacts to epithelial to form tissues

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5
Q

Coelom

A

Acoelomate(diplo)

Coelom triplo

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6
Q

Advantages of a coelom

A

Allows space
Hydrostatic force
Peristalsis

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7
Q

Animal kingdom phyla

A 
Cnidaria                Anthropoids 
Porifera 
Platyhelminthes 
Annelida 
Chordata
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8
Q

Porifera characteristics

A 
Asymmetrical  
collar cells line interior 
Acoelomate 
No tissue layers 
Protected by minute spicules
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9
Q

Sessile:

A

Fixed to one spot

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10
Q

Spicules are made of

A

Calcium silica or protein

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11
Q

Cnidaria characteristics

A 
Aquatic                  Has cnidocytes 
Acoelomate 
Radial symmetry 
Diploblastic 
Digestive cavity
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12
Q

Cnidocytes

A

Specialised stinging cells

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13
Q

Platyhelminthes characteristics

A 
Doris centrally flattened 
Bilateral symmetry       
One opening cephalisation
Acoelomate 
Triplo
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14
Q

Annelida characteristics

A 
Segmented+cylindrical 
Bilateral symmetry 
 Triploblastic   
coelom 
Cephalisation
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15
Q

Advantages of segmentation

A

Improve ability to move

Through gut = flexib and hydrostatic skeleton

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16
Q

Arthropoda characteristics

A 
Bilateral symmetry 
Haemocel  and thru gut 
Segmented 
Cephalisation 
triploblastic
17
Q

What makes anthropoids strong

A

Waterproof exoskeleton
Paired and jointed appendages
Muscular system

18
Q

Chordata characteristics

A

Notochord
Post anal tail
Doris hollow tubular nerve chord
Pharyngeal

Biology Gr11 (12 decks)

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