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Biology 102 > Lab 4: Annelids/Nematoda > Flashcards

Lab 4: Annelids/Nematoda Flashcards

1
Q

Gastrulation (Broad definition)

A

Turning from a ball of cells into an organism with multiple layers

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2
Q

Invagination

A

When the cells fold in on themselves, creating an inner layer and outer layer.

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3
Q

What is the cell called during invagination?

A

Blastula

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4
Q

Coelom (Broad definition)

A

Internal body cavity within mesoderm

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5
Q

True coelom

A

a coelom that is entirely lined with mesodermic tissue

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6
Q

Subcategory relationship between: Bilateria, Lophotrochozoa, Protostomia, Ecdysozoa and Deuterostomia

A

Bilateria->(Proto/Deutero)

Proto->(Lophotrochozoa/Ecdysozoa)

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7
Q

Lophotrochozoa: (lophophore/trochophore)

A

Ciliated feeding structure, larval stage

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8
Q

Ecdysozoa: (Ecdysis)

A

Molting, producing non living cuticle

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9
Q

Cuticle

A

Shell from Ecdysis

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10
Q

Metameric Segmentation

A

serial repition of similar parts along the length of an animal

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11
Q

Functions of Coelom (4)

A

Space: organ development and gametes
Hydrostatic Skeleton
Fluid can distribute nutrients
Digestive Muscles can be separate from movement.

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12
Q

Chaetae:

A

Bristles that anchor segment of annelid during movement

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13
Q

Parapodia

A

fleshy appendages that contain bristles, and are used for locomotion, respiration, defense

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14
Q

Annelid Class: Polychaetes

A

have many fleshy parapodia

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15
Q

Annelid Class: Oligochaeta

A

earthworms, only a few “oligo” ventral bristles

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16
Q

Annelid Class: Hirudinea

A

Leeches, reduced coelom, suckers for locomotion and attaching to hosts

17
Q

Annelid Feeding Strategies

A

predators, deposit feeder, suspension (U tube feeders) ALL SCAVENGERS

18
Q

Organs for Annelid digestion

A

pharynx->esophagus->crop(storage)->gizzard(grinding food)->intestine (chemical breakdown and absorption)

19
Q

Annelids: Excretion

A

Two metanephridia (little kidneys)

20
Q

Annelids: Osmoregulation

A

Filtration due to coelomic fluid drawn through a funnel by cilia

21
Q

Annelids: Reproduction

A

some sexual, some hemaphroditic, some asexual

22
Q

Nematoda:

A

roundworms, ecdysozoans

23
Q

Nematoda: Support

A

Hydrostatic skeleton, but only with longitudinal muscles. Opposition by cuticle

24
Q

Nematoda: Nervous system

A

ring brain, chemical and touch receptors

25
Q

Nematoda: Feeding Strategies

A

predators, herbivores, deposit feeders, parasites, full gut/digestion system

26
Q

Nematoda: Gas and circulation

A

direct diffusion. Also pseudocoelom used for nutrient distribution

27
Q

Nematoda: Excretion

A

anus or diffusion

28
Q

Nematoda: Reproduction

A

sexual or hermaphroditic

Biology 102 (4 decks)

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