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Zoology 2017 > Platyhelminthes > Flashcards

Platyhelminthes Flashcards

1
Q

What is Platyhelminthes?

A

Phylum - flatworms, flukes, and tape worms

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2
Q

Platyhelminthes Body Plan

A

Bilateral symmetry

3 tissue layers - epidermis, gastrodermis, mesoderm

No coelom

Parenchyma

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3
Q

Platyhelminthes Respiration

A

Diffusion

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4
Q

Platyhelminthes Sensory Equipment

A

Some with eyespots

Nerve net, longitudinal nerve cord, and anterior gangial

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5
Q

Platyhelminthes Waste

A

Ejestion out of the mouth

Excretion/osmoregulation via flame bulbs

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6
Q

Platyhelminthes Reproduction

A

Sexual

  • hermaphroditic
  • internal fertilization

Asexual
- regeneration

Penis wars
Sometimes male will penetrate cell wall of females

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7
Q

Tripoblastic

A

3 tissue layers

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8
Q

Platyhelminthes Movement

A

Hydrostatic skeleton, cilia,

Peristalsis

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9
Q

Peristalsis

A

Alternating waves of contraction of circular and longitudinal muscles

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10
Q

Dorsoventral muscles

A

Allow flat worm to flatten even further

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11
Q

Parenchyma

A

Loose connective tissue in the mesenchyme

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12
Q

Flame Bulbs

A

Act like kidneys

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13
Q

Vitelline Glands

A

Add yolk to eggs

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14
Q

Seminal Receptacle

A

Receives and stores sperm (female organ)

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15
Q

Seminal Vesicle

A

Hold sperm (male organ)

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16
Q

Polycladia

A

Digestive system with many-lobed intestine

17
Q

Tricladia

A

Digestive system with three-lobed intestine

18
Q

Neorhabdocoela

A

Digestive system with simple intestine

19
Q

Acoela

A

Digestive system with no intestine, but nutritive cells

Zoology 2017 (6 decks)

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