Phylum Cnideria

Question 1

general characteristics

Answer 1

radial symmetry 
specialized cells
mesoglea-middle layer
true tissues
stinging cells
respond to touch
live in oceans

Question 2

examples

Answer 2

jellyfish
coral
sea anemone
hydra

Question 3

digestion

Answer 3

mouth in - Gastrovascular cavity - mouth out
food is caught by tentacles and moved into GVC and digested there
tentacles have cnidocytes (stinging cells) and nematocysts (small harpoon)

Question 4

respiration

Answer 4

diffusion

Question 5

circulation

Answer 5

Gastrovascular Cavity

Question 6

excretion

Answer 6

sac body plan
one opening as mouth and anus
digestive waste expelled thru mouth

Question 7

nervous system

Answer 7

specialized nerve tissues
respond to touch
ocelli - eyespot responds to light
movement
polyp=sessile 
they have a hydrostatic skeleton which allow them to bend and extract
Medusa= motile
jet propulsion

Question 8

asexual reproduction

Answer 8

budding

polyp

Question 9

sexual reproduction

Answer 9

external fertilization

egg and sperm

Question 10

jelly fish and hydra are part of what phylum

Answer 10

Cnideria

Question 11

stinging cells are called

Answer 11

cnidocytes

Question 12

free swimming and sexual reproduction

Answer 12

medusa

Question 13

jelly like substance in between the endo and ectoderm

Answer 13

mesoglea

Question 14

poison filled stinging dart

Answer 14

nematocyst

Question 15

the GVC is the equivalent to the human

Answer 15

stomach

Question 16

the sessile and asexually reproducing generation

Answer 16

Polyp

Question 17

water flow functions in a cnidarian?

Answer 17

circulation
respiration
reproduction
excretion

Question 18

advantages that cnidaria have over Porifera

Answer 18

radial symmetry
ecto and endoderm
alternation of generations
stinging cells
movement

Question 19

what body plan?

Answer 19

sac body plan

Question 20

tissue layers

Answer 20

ectoderm and endoderm

Question 21

symmetry?

Answer 21

radial