animal 1 Flashcards
(28 cards)
phylum: cnidarians
radial symmetry two cell layers ecto/endo tissue level of organization hermaphrodites gvc polyp/medusa
classes of cnidarians
hyrozoa: mostly polyp
Anthozoa: only polyps
Scyphozoa: mainly medusa
platy
bilateral symmetry
cephalon action
3 layers of cells
mesoderm
excretion and ingestion hard: branched gvc, flat, flame cells
Turbellaria
free living worms planarian
cross eyed
Trematoda
flukes: blood organs, parasitic
Cestoda
tapeworm parasitic head w suckers no gvc multiple hosts
life cycle of tapeworm
adult attaches in human mature proglottid fertilization gracias proglottid elimination egg in feed ingestion by cow 6hooked larva encysted by bladder worm eat raw meat
sponge
germ layers: 0 body cavity: central cavity (osculum) digestion: archeocyres engulf food particles lysosomes circulation: choanocytes: flagella reproduction: sexual excretion: out of osculum nervous system: protective skeletons
hydra
germ layers: 2
Body cavity; gvc
digestion: extra: gland cells intra: vacuoles and lysosomes
reproduction: polyp- asexual, medusa-sexual
excretion: diffuse, out through mouth
nervous system: sensory cells, nerve net in mesoglea,
planaria
germ layers:3 gvc digestion: extra/intra+pharynx reproduction: hermaphrodites, internal fertilization excretion: flame cells nervous system: ganglia, nerve cords
fluke lifecycle
egg in feces, miricidum in water, sporocyst in snail, redia in snail, cercaria, cercaria in fish-encysted, eat raw fish in humans
osculum pore spicule archeocyte choanocyte
water and food leaves
water and food enters
part of skeleton and is used in classification
make spicules and engulf food particles and circulate their nutrients
use flagella
animals
heterotrophs eukaryotic multicellular reproduce sexually respond to stimuli mobile vertebrates or invertebrates
trends in animal evolution
levels of organization: tissues, organs, systems
radial to bilateral symmetry
cephalization
body plan: sac plan to a tube
cnarians
7
radial symmetry tentacles w nematocysts tissues two cell layers- ecto/endoderm hermaphrodite gastrovascular cavity polyp, medusa
hydra things
8
germ layers 2 body cavity: gvc respiration:diffusion circulations: h20-flagellated cells reproduction: asexual: budding sexual
excretion: diffusion
nervous: cnidocyte, sensory cells
phyla
porefeira cnidarians platy athurapods cordata
advantages of each body plan
2 opening digestive system
-parts of the tube can specialize, extra cellular is now more important
-more powerful
body cavity
-cushions internal organs from shock
-provides a space for internal organs to develop
-more primitive
arthropod characteristics
jointed legs segmented bodies exoskeleton separate sexes open circulatory system excrete by green glands is malpighian tubes cephalization bilateral symmetry
Chordata
dorsal hollow nerve cord vertebrate post anal tail central heart endo skeleton
agnatha
jawless fishes
extotherms
osteichthyes
fish
two chambered heart
chondrichthyes
sharks
cartilage
