Flashcards in Animal Diversity Deck (61)
What types of animals would be considered sessile?
Animals who move very little are?
If an animal has an endoskeleton, they are considered?
If animals have an exoskeleton, they are considered?
What kind of skeleton do worms and Echinoderms have?
Fluid filled cavities called hydrostatic skeleton
What are the only animals that are purely cellular?
What are the 3 habitats that animals live in?
Fresh water, marine, land
Most animals with radial symmetry are either ________________ or _____________.
Sessile or sedentary
When animals can be divided into equal halves are considered?
Animals with bilateral symmetry normally are ____________ and __________________.
Mobile and show cephalization
What are the 3 germ layers?
What is encompassed in the outer ectoderm?
Body coverings and nervous system
What does the middle mesoderm encompass?
Skeleton and muscle (and everything else)
What does the inner endoderm encompass?
Digestive organs and intestine
What type of body cavity do acolamates have?
No body cavity
What type of body cavity do psuedocolomates have?
False body cavity
What type of body cavity do colemates have?
True body cavities
When blood flows through vessels that are seperated, what type of circulation system is it considered?
When blood is just floating around, spilled out then absorbed, it is considered what type of circulation system?
Open circulation system
When a zygote undergoes rapid cell developments what is that called?
What is a hollow balls of cells called?
When a blastula invaginates, it forms what?
The two layers of a gastrula are what?
And what do they differentiate too?
Ectoderm->must be skin or nerve cells
Endoderm-> can not be skin or nerve cells
What is it called when animal bodies are divided into parts?
What makes up phylum Porifera?
Sponges can live in?
Marine and freshwater
What type of relationships do sponges have?
Parasitic and commensalist relationships
What are Ostia?
What are osculum?