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Flashcards in Animal Diversity Deck (61)
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1

What types of animals would be considered sessile?

Sponges

2

Animals who move very little are?

Sedentary

3

If an animal has an endoskeleton, they are considered?

Vertabrates

4

If animals have an exoskeleton, they are considered?

Invertebrates

5

What kind of skeleton do worms and Echinoderms have?

Fluid filled cavities called hydrostatic skeleton

6

What are the only animals that are purely cellular?

Sponges

7

What are the 3 habitats that animals live in?

Fresh water, marine, land

8

Most animals with radial symmetry are either ________________ or _____________.

Sessile or sedentary

9

When animals can be divided into equal halves are considered?

Bilateral symmetry

10

Animals with bilateral symmetry normally are ____________ and __________________.

Mobile and show cephalization

11

What are the 3 germ layers?

Outer ectoderm
Middle mesoderm
Inner endoderm

12

What is encompassed in the outer ectoderm?

Body coverings and nervous system

13

What does the middle mesoderm encompass?

Skeleton and muscle (and everything else)

14

What does the inner endoderm encompass?

Digestive organs and intestine

15

What type of body cavity do acolamates have?

No body cavity

16

What type of body cavity do psuedocolomates have?

False body cavity

17

What type of body cavity do colemates have?

True body cavities

18

When blood flows through vessels that are seperated, what type of circulation system is it considered?

Closed circulation

19

When blood is just floating around, spilled out then absorbed, it is considered what type of circulation system?

Open circulation system

20

When a zygote undergoes rapid cell developments what is that called?

Cleavage

21

What is a hollow balls of cells called?

A blastula

22

When a blastula invaginates, it forms what?

A gastrula

23

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

24

What is it called when animal bodies are divided into parts?

Segmentation

25

What makes up phylum Porifera?

The sponges

26

Sponges can live in?

Marine and freshwater

27

What type of relationships do sponges have?

Parasitic and commensalist relationships

28

What are Ostia?

Tiny pores

29

What are osculum?

Large openings

30

What are the 3 types of cells in sponges?

Choanocytes
Amebocytes
Spicules