Animal Kingdom Flashcards
what percent of the Animal Kingdom are insects
70%
characteristics of all animals
- Ingestive heterotrophs
- Multicellular
- Mobile at some point in life
- Eukaryotes
- Produce gametes in gonads
- Young develop in egg or mothers body
- Some are sessile- permanently attached to one spot
Where did the first animals come from
the sea during precambrian era
what is symmetry where body parts are arranged around a central point
Radical symmetry
what is a pro of radical symmetry
detect food and danger from any direction
Symmetry where 1/2 of the body is a mirror image of the other half
Bilateral symmetry
what is a pro of bilateral symmetry
move more efficiently
what symmetry is having an arrangement of body parts that cannot be divided into corresponding sections
Asymmetrical
what is an example of bilateral symmetry
a beetle or a lobster
what is an example of radical symmetry
coral polyp
What is an example of asymmetrical
a crab
what is the top or back region
dorsal
what is the lower or belly region
ventral
what is the front or head region
anterior
what is the tail or rear region
posterior
define cephalization
most nervous and sensory structure are in the anterior end
what undergoes repeated cell division to form hollow ball of cells called the blastula
zygote
true or false
the blastula folds inward forming the gastrula stage
true
what is the opening into the gastrula called
blastopore- it becomes the mouth of the anus of the digestive tract
what is “true” coelom
body cavity lined on both sides with mesoderm
true or false
coelomates can be protostomes and deuterostomes
true
what is an animal whose blastopore develops into a mouth
protostomes
examples of protostomes
- flatworms
- roundworms
- segmented worms
- mollusks
- arthropods
define deuterostomes
an animal whose blastopore deveops into an anus
examples of deuterostomes
echinoderms and chordates
what is a body cavity lined on only 1 side with mesoderm
pseudoelom
define acoelom
no body cavity
what are advantages to body cavity
- provides space for visceral organs
- separates muscles of gut from muscles of body wall
- fluid within acts as a simple circulatory system
true or false
ALL animals have three cell layers that form during embryonic development called germ layers
FALSE
what is the outer germ layer; forms epidermis, nerves sense organs
ectoderm
what is endoderm
inner germ layer that forms lining of digestive tract and lining of respiratory tract
Define mesoderm
middle germ later and forms muscles, bones, circulatory, reproductive, excretory systems, dermis
inner tube-
Outer tube-
packed between tubes-
digestive tract
deals with outside world, protection, sense organs
muscles, blood vessels, visceral organs
9 major phyla of animal kingdom
Porifera
Cnidaria
Platyhelminthes
Nematoda
Annelida
Mollusca
Arthropoda
Echinodermata
Chordata
what is the result of fertilization of an egg from a sperm
zygote
what is the inner germ layer that forms lining of digestive tract and lining of respiratory tract
endoderm
True or false
A protostomes is an animal whose blastopore develops into an anus
False
True or false
75% of all animals are vertebrates
false
true or false
the first animals arose from the sea
true
what type of symmetry is a gecko (lizard)
Bilateral
what is NOT a protostomes
chordates
what type of symmetry is a starfish
radical
what is NOT something the mesoderm develop into
digestive system
what are two advantages to having a body cavity
1) provides space for visceral
2) separates muscles of gut from muscles of body wall
what does cephalization mean?
most nervous and sensory structure are in the anterior end
