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BIO244 Animal Diversity > Annelida > Flashcards

Annelida Flashcards

1
Q 
The layer of the mesoderm that lines the body wall and forms the septa is called the
A) 	mesentery.
B) 	parapodium.
C) 	peritoneum.
D) 	odontophore.
A

C) Peritoneum

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2
Q 
The paddlelike appendages that characterize the Errantia are called
A) 	propodia.
B) 	peripodia.
C) 	parapodia.
D) 	setae.
A

C) Parapodia

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3
Q

The hirudineans Usually lack setae. True or False

A

True

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4
Q

a stiff structure resembling a hair or a bristle, especially in an invertebrate is called…….

A

Setae

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5
Q

The structure seen in some Sedentaria, which secretes mucus and produces a cocoon that protects the developing young zygote, is called the …..

A

Clitellum

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6
Q

The hirudineans have 34 segments, anterior and posterior suckers, and no parapodia. True or False

A

True

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7
Q

The body cavity of an annelid is referred to as a pseudocoelom. True or False

A

False. It is a Coelom

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8
Q

The first segment of an annelid, which bears the mouth, is called the prostomium. True or False

A

True.

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9
Q

The organ of excretion in annelids is the…..

A

Nephridium

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10
Q

Development in the hirudines is direct, and therefore no larva is formed. True or False

A

True

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11
Q 
The order Clitelleta is located within the class:
A) 	Errantia
B) 	Sedentaria
C) 	Onychophora
D) 	Hirudinea
A

B) Sedantaria

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12
Q

What is the basic Phylogeny of Annelids

A

True tissue -> Bilaterally symmetrical -> Protostome development -> Lophotorochozoa -> Segmented coelom present

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13
Q

What are the major external features of an Annelid

A

Metamerism - Prostomium - Pygidium - Bilaterally symmetrical with head - Moist cuticle - Paired parapodia/Setae

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14
Q

Define Metamerism

A

Segmented body

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15
Q

Define Prostomium

A

Head - contains brains

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16
Q

Define Pygidium

A

Carries anus - Regenerates new body parts

17
Q

What are the parapodia/setae used for

A

Used for mobility and also staying stationary

18
Q

What are common feeding habitats

A

Herbivorers - Omnivorers - Predator
Liner unsegmented gut - Mouth and anus - Reversible pharynx - Sedentaria have muscular gizzard
Hirudines have grasping teeth

19
Q

Describe an Annelids skeleton and locomotion

A

Hydrostatic skeleton via coelom. Longitudinal muscles (Inner) and Circulatory muscles (Outer)

20
Q

Describe the respiratory/circulatory system of an Annelid

A

Permeable body covering - Closed circulatory system - Dorsal vessels carrie blood anterioly - Ventral vessels carries blood posteroily - Lateral vessels link them + work as 5 large hearts

21
Q

How do Annelids deal with waste excretion.

A

Paired nephridia in each segment/Some Ammonia across body surfaces

22
Q

Describe the basic Annelid nervous system

A

Anterior brain with a solid ventral nerve cord

Light/Chemical/Touch/Vibration Receptors across the whole body

23
Q

What is the function of the Hormeno system

A

To stimulate gonads in order to regrow them

24
Q

How does each family with in Annelid reproduce?

A

Errantia/Setentaria are Dioecious (Can be asexually)

Clitellate (Distinctive Gonads)/Hirudinidae (Internal) are hermaphroditic

25
Q

What are Errantia’s characteristics

A

Distinct head with Sense organs/Chitinous jaws - Parapodia/setae for locomotion/burrowing/Respiration - No permanent gonads - Gametes arise via swelling in Peritoneum. External fertilisation

26
Q

Define the Peritoneum

A

Membranes that line the cavity of the abdomen

27
Q

What are Hirudineas major characteristics

A

No Parapodia/Setae/sensory appendages (Has eyes) - Posterior/oral suckers - Hermaphroditic (Clitellum) - Carnivorous

28
Q

Define the Clitellum

A

Area for the reproductive organs

29
Q

What are the general reproductive features of Hirudineas?

A

Typically have ventrally opening Gonopores/ Or just a penis and vagina - Internal fertilisation via Spermatophore or Hypodermic implantation.
Young develop in Coccoons

30
Q

Define Gonopore

A

Genital pore

31
Q

Define spermatophore

A

A protein capsule containing a mass of spermatozoa

32
Q

Briefly describe the CNS of a Hirudinea

A

Large Neurons in a single layer in 32 segments, each with a ganglion/repeats for each segments

BIO244 Animal Diversity (14 decks)

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