Chapter 33/34

asymmetry

no shape, ex.amoeba

spherical symmetry

circular, ex. volvox

radial symmetry

tube/bell shaped body

bilateral symmetry

2 sided shapecan only be cut one way to get equal halves

dorsal

upper surface

ventral

lower surface

protosomes

worms, anthropods, clams

deuterosomes

vertebrates, starfish

ectoderm

skin and nervous system

mesoderm

muscle

endoderm

digestive system lining

2 kinds of skeletons secreted by sponges

spiculespongin

spicule

calcium carbonate or silicon compounds

spongin

protein fibers, soft and flexible

2 cell layers of sponges

ectoderm-forms into epidermisendoderm-made of collar cells

mesenchyme

middle jelly layer of a spongeholds layers together

gemmule

cells in a hard coat, dormant stage of sponge

2 cell layers of Cnidarians

endodermepidermis

mesoglea

jelly layer of Cnidarians

nerve net

Cnidarianslocated in mesoglea"brain

nematocysts

stinging cells

basal disk

attaches hydra to places

How to Cnidarians get food?

they capture them in their tentaclesplankton get paralyzed

polyp

tube like body in the Cnidarians

gastrovascular cavity

tube like stomach

endoderm in Cnidarians

secretes enzymes for digestion

digestion in Cnidarians

goes back up the mouth

oral lips

giant lips of Aurelia

planula

larva of a jelly fish

ephyra

baby medusas

marginal reefs

close to shore-few miles ex. ones in Caribbean

barrier reefs

far from shore-40-50 milesex. Great Barrier reef

atoll reefs

small islandex. bikini atollsmade from reefs that have come above water when water levels fluctuatedin south Pacific

cephalization

concentration of nerve cells in anterior end of an animal

eyespots

detect light

pharynx

tube like vacuum on ventral side that sucks up food

genital pore

opening into both systems

What neg. responses does a planarian have?

light

flame cells

ciliated collect poisonous liquid nitrogen wastes

excretory ducts

carry waste towards excretory pores in skin

ovaries

make eggs

oviducts

carry eggs away from ovaries

yolk glands

produce yolkcharacteristic of egg laying animalsyolk is food supply for embryo

vagina

passageway into female reprod. system

seminal receptacles

holds sperm from another wormstorage sack for spermchar. of invertebrates

testes

makes sperm

vas efferens

tiny tubes that carry sperm from testes

vas deferens

large tubes that carry sperm from testes

seminal vesicle

stores sperm from worm, worm where it is made

atrium

hallway" passageway to male and female reproductive system

number of eggs that planarians lay at once?

100

acoelomate

organism with no body cavity

3 acoelomate phylums

porifera-2 cell layerscoelenterata-2 cell layersplatyhelminthes-3 cell layers

Where do blood flukes live?

tropical and subtropical environments

hooks and suckers of tapeworm

attach worm to small intestine

cuticle of a tapeworm

secreted body covering for protection against host immune system

tegument

thickened cell membrane around skin cells

proglottid

contains reproductive system

uterus

sack for storing eggs

symptom of hookworms

anemialoss of RBCtired,weakbloody diarrheamakes you susceptible to other diseases

where does trichinosis occur?

skeletal musclesdiaphragmheartcan be fatal for humans

mastax

grinding organ in digestive system

degeneration

loss of systems in parasites in comparison to their free living relatives

hydrotheca

feeding polyptentacles have nematocysts

gonotheca

reprod. polypasexual budding

gonad

ovaries or testes on medusa

polyp stage of obelia

lives in bottom of oceanhow obelia spends most of its life

medusa

uses jet propulsionfree swimmingsexual stage of obelia

jet propulsion

take water in mouth and shoot put water to move

collar cells

create water current to make whirlpool to bring in food

filter feeding

when animals filter and eat planktonex. sponge

osculum

excurrent porewater goes out

ostia

incurrent porewater goes in

amoebocyte

carries food from collar cells to epidermis