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BIO 2135, Animal Form and Function > Annelids > Flashcards

Annelids Flashcards

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Biology 101 flashcards
1
Q

Where is the dorsal heart located?

A

Pericardial cavity

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2
Q

What is metamerism?

A

Repetition of a segment of a body

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3
Q

What kind of chitin is used by this group?

A

Beta-chitin

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4
Q

Name of the anal opening is called

A

Pygidium

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5
Q

What surrounds the mouth of the worm?

A

Peristomium

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6
Q

Leaches are annelids that have turned…

A

To predation

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7
Q

Size of coelomic space in Earthworms?

A

Large

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8
Q

What role do seta play in the earthworm

A

They are able to stick out when the longitudinal muscle contracts, used to anchor worm to substrate

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9
Q

What is role of coelomic fluid?

A

Hydrostatic skeleton

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10
Q

What direction does the dorsal vessel push blood?

A

Forward

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11
Q

What blood vessels connect dorsal and subneural?

A

ventral

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12
Q

What is the correct name for worm hearts/?

A

Aortic arches

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13
Q

What is main reason for aortic arches?

A

Supply richest blood to reproductive organs

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14
Q

What is the role of chloragogen tissue?

A

Used for deamination of blood

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15
Q

Define typhlosole?

A

gut is infolded to make more surface area

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16
Q

Define calciferous glands?

A

Used to take out calcium that is found in food source

17
Q

Describe the metanephridia

A

Rids organism of metabolic waste, coelomic fluid picked up by the nephrostome, and then flushed out nephridiopore

18
Q

What side is the brain located on?

A

Dorsal

19
Q

Role of clitellum

A

Used to bind the mating worms together, and later shrugs off to form cocoon for the egg

20
Q

How the egg of worms is formed

A

Once insemiated, the clitellum starts to shrug of the worm. As it passes the ovary opening, the fertilized egg is released into the clitellum. The entire thing shrugs off, clitellum seals around entire egg.

21
Q

What is similar to some insect development?

A

No larval stage

22
Q

How are the parapodia moved?

A

Oblique muscles

23
Q

What two kinds of muscle do clitalata have?

A

Longitudinal and obliques

24
Q

What is the difference between the neuropodium and the notopodium?

A

Neuropodium is on the ventral side, like the nerve cord.

25
Q

Define nereid movement

A

Oblique muscles on one side contract, allowing body to wiggle back and forth (sinusoidal movement)

26
Q

What is the role of cirrus

A

They are fleshy extensions that sense the medium the organism is passing through

27
Q

What is important about the body cavity of leeches?

A

Basically gone, only small coelomic space around nerve cords and such

28
Q

How many jaws do leaches have?

A

three

29
Q

The decrease in coelomic cavity allows for expansion of what?

A

The digestive system

BIO 2135, Animal Form and Function (18 decks)

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