chapter 16 (a & b) Flashcards
3 germ layers
endoderm
mesoderm
ectoderm
specialized cell in all cnidarians
cnidocytes
2 forms of cnidarians
polyp
medusa
endothermic
body temperature is regulated by their metabolism
ectothermic
body temperature is regulated by the environment
6 characteristics of an animal
-body plan
-support system
-reproduce
-eat
-respirate
-movement
oviparous
the egg develops outside the mother
vertebrate
has a backbone
3% of animals
3 types of symmetry and examples
asymmetrical - sponge
radial - jellyfish
bilateral - hippo
exoskeleton
support/skeleton on the outside ex. crab
learned behavior v. instinct
learned - behavior taught by the environment
instinct - behavior that’s there at birth, doesn’t have to be learned
cnidarian nervous system
nerve net
invertebrate
no backbone
97%
what does each germ layer become
endoderm - digestion
mesoderm - circulatory/muscular system
ectoderm - nervous system/skin
hermaphrodite
has male and female reproductive parts
hydroskeleton
water buoyancy is used as a form of support ex. jellyfish
characteristics of porifera
germ layers - 1
digestion - central cavity, intracellular
ingestion - water through the ostia
body plan - asymmetrical
reproduction - budding, external cross fertilization
nutrition - filter feeders
viviparous
inside the mother, connected to the mother
ovoviviparous
inside the mother, not connected
endoskeleton
skeleton inside the body
draw and label a hydra
characteristics of cnidarians
germ layers - 2
digestion - incomplete, intracellular
ingestion - tentacles to the mouth to the gastrovascular cavity
body plan - radial
reproduction - budding, external fertilization
nutrition - carnivorous
