Bio Lab 122 Experiment 2

Front 1

Coelom

Back 1

A cavity within the body that is lined with tissues that arise from the mesoderm

Front 2

Acoelomates

Back 2

animals that lack a coelom

Front 3

Pseudocoelmates

Back 3

have body cavities that are partially, but not completely lined with mesodermal tissues. Outside with mesoderm and inside with endoderm.

Front 4

Coelmates

Back 4

have body cavities that are completely lined with mesoderm.

Front 5

Protosomes

Back 5

have spiral cleavage, determinate cleavage, schizocloelous developmental patterns, mouth forms from the blastopore.

Front 6

Dueterostome

Back 6

have radial cleavage, indeterminant cleavage, enterocoelous developmental pattern, and the anus forms from the blastopore

Front 7

Phylum Chordata

Back 7

notochord, dorsal hollow nerve cord, pharygeal slits, muscular tail

Front 8

Spongocoel

Back 8

a sponge's central cavity

Front 9

ostia

Back 9

where the water enters the spongocoel through the walls

Front 10

osculum

Back 10

the larger hole through which the water exits the spongue.

Front 11

porocytes

Back 11

lining in the ostia cells

Front 12

choanocytes

Back 12

collar cells, flagellated and create a current and filter food particles out of the water stream

Front 13

spicules

Back 13

serve as a type of endoskeleton for the spongue

Front 14

medusa

Back 14

free-swimming stage in the Phylum Cnidaria

Front 15

polyp

Back 15

stantionary stage of Cnidaria

Front 16

nerve net

Back 16

lacks specialized ganglia and brain

Front 17

nemotocysts

Back 17

venomous, stinging organelles

Front 18

cnidocytes

Back 18

cells where the nemotocysts are found.

Front 19

two outer layers charactersitic of cnidaria

Back 19

epidermis and gastrodermis, separated by the mesoglea

Front 20

epitheliomuscular cells

Back 20

column-shaped cells containing contractile fibers that allow the Hydra to control the length of its body and tentacles

Front 21

interstitial cells

Back 21

produce the sperm and eggs

Front 22

oral disk

Back 22

oral end of the body flares to form this structure on the metridium

Front 23

pedal disk

Back 23

at the aboral end and anchors the metridium and allows it to moove slowly

Front 24

siphonoglyphs

Back 24

openings lined with cilia through which water is constantly flowing in and out of the gastrovascular cavity of the anenmoe.

Front 25

parenchyma

Back 25

the space between the epidermis and the gastrovascular lining is filled by this solid mass in acoelomates

Front 26

pharynx

Back 26

opens into the internal gastrovascualr cavity

Front 27

scolex

Back 27

head region of the tapeworms

Front 28

proglottids

Back 28

repeated segments of the tapeworm's body

Front 29

corona

Back 29

wheel organ, that gathers food from the surrounding water for rotifers

Front 30

mastax

Back 30

grinds up food in the rotifer

Front 31

two sections of the squid head region?

Back 31

tentacles and a visceral humo with two lateral fins

Front 32

what is the viceral hump is covered by?

Back 32

the thick, muscular mantle

Front 33

what are the types of tentacles?

Back 33

four pairs of short tentacles of fixed length and one pair of much loner retractile tentacles that have pads of suckers at their tips.

Front 34

what is the siphon?

Back 34

the funnel-like structure in the mantle cavity that forces water through at a high pressure

Front 35

what is the skin of the mantle covered with?

Back 35

pigment cells called chromatophores

Front 36

what the mantle primarily consist of?

Back 36

circular muscule tissue

Front 37

what prevents the water from moving backward through the siphon?

Back 37

a muscular valve

Front 38

what is the spermatophoric organ?

Back 38

a sack-like structure in which the sperm is deposited

Front 39

what are spermatophores?

Back 39

the baseball-bat shaped structures where the sperm are packaged

Front 40

what is the oviduct?

Back 40

eggs produced in the ovary are discharged into the oviduct and secretes a gelatinous substance that suurounds the clusters of eggs.

Front 41

what is the pen?

Back 41

acts as a hard endoskeleton

Front 42

what kind of circulatory system does hte suid have?

Back 42

closed

Front 43

where are the two brachial hearts?

Back 43

at the ends of the gills closest to the top of the mantle

Front 44

what is the systematic heart?

Back 44

the heart that receives the oxygenated blood, located between the two brachial hearts

Front 45

what takes the blood to the rest of the body?

Back 45

two large aortae

Front 46

what is the function of the lens?

Back 46

it separates the two fluid-filled chambers of the eye

Front 47

what is in front of the lens?

Back 47

the iris, which regulates that amount of light that enters the lens

Front 48

what are the other parts of the eyes?

Back 48

viterous humor, retina, pupil, photoreceptor cells, and optic nerves

Front 49

what are metameres?

Back 49

the repeated segments along the A-P axis in annelids

Front 50

what is this type of segmentation?

Back 50

metameric segmentation

Front 51

what is the prostomium

Back 51

the covering over the mouth at the anterior end

Front 52

what is the clitellum?

Back 52

several enlarged segments that form a swollen band about 1/3 body length from the anterior end.

Front 53

what sex are earthworms?

Back 53

hermaphrodites

Front 54

what are setae?

Back 54

bristle-like structures that help anchor the worm in the soil

Front 55

how does the earthworm move?

Back 55

peristaltic waves

Front 56

what produces these contractions?

Back 56

circular and longitudinal muscles

Front 57

how many hearts does a worm have?

Back 57

five

Front 58

what are right next to the aortic loops?

Back 58

the seminal vesicles

Front 59

where does food first enter?

Back 59

the buccal cavity

Front 60

where does it go next?

Back 60

the pharynx

Front 61

what comes next?

Back 61

the esophagus

Front 62

the esophagus delivers the food to where?

Back 62

the much wider crop, which acts as a storage chamber

Front 63

what is next?

Back 63

the hard and muscular gizzard

Front 64

and next?

Back 64

the intestine, where digestion and absorption takes place

Front 65

what are castings?

Back 65

feces of worms