LESSON 6: ANNELIDA

Question 1

Phylum that has Wormlike body with segments

Answer 1

Phylum Annelida

Question 2

-Body of annelids have this.
-It is a characteristics that features regularly repeating body segments

Answer 2

Metamerism

Question 2

Phylum Annelida have 3 classes:

Answer 2

-Oligochaeta
-Polychaeta
-Hirudinea

Question 3

Annelids are sometimes called “_______” because of the tiny chitinous bristles that they bear (except leeches).

Answer 3

Bristle Worms

Question 3

The chitinous bristles that the phylum Annelida bears (Except leeches) is called ______

Answer 3

Setae

Question 4

The body of an Annelid is usually consists of 3 parts:

Answer 4

-Head
-Metameres
-Terminal Segment

Question 5

The head have _________ and ___________

Answer 5

-Prostomium
-Peristomium

Question 6

the protruded mouth part

Answer 6

prostomium

Question 7

-surround the prostomium
-first true segment of an annelid

Answer 7

Peristomium

Question 8

a series of body segment on annelid body

Answer 8

Metameres

Question 9

Terminal segment of annelid

Answer 9

pygidium

Question 10

Some Annelid have fleshy appendages where setae attached/found connected to

Answer 10

Parapodia

Question 11

Other characteristic of Annelid body

Answer 11

-They have coelomate body cavity
-Bilateral symmetry

Question 12

Annelids have __________ organ system

Answer 12

Established organ system

Question 13

Various systems of annelid body include:

Answer 13

-gut
-blood vessels
-nerves cord (penetrates each individual segment)

Question 14

Have a true body cavity

Answer 14

Eucoelomate

Question 15

A body cavity or a coelom is surrounded by ________

Answer 15

Mesoderm

Question 15

Annelids have both ___________ and _________ muscles which creates waves of expansion and contraction when they move.

Answer 15

Longitudinal and circular muscles

Question 16

The movement/locomotion of annelids is called ________

Answer 16

Peristalsis

Question 17

Fluid in coelom acts as a __________ for annelids skeletal system

Answer 17

Hydrostatic skeleton

Question 17

The annelids have nervous system, which is connected to a pair of ventral longitudinal nerve cords, with _______ in each segment (metameric)

Answer 17

Ganglion

Question 18

Annelids are the first group of invertebrates which have developed _______________

Answer 18

Closed circulatory system

Question 19

Closed circulatory system, in which the blood is always ________________ that run the length of the body and branched to every segment.

Answer 19

enclosed within blood vessels

Question 20

Annelids have how many hearts

Answer 20

Several hearts (5 in earthworms)

Question 21

The exchange of gasses in annelids is by ______________.

Answer 21

diffusion through skin into blood capillaries

Question 21

The skin of annelids is kept moist by ______ and ____________

Answer 21

mucus and coelomic fluid

Question 21

The breathing system in annelids is __________

Answer 21

not present

Question 21

The digestive system of annelids are ________ and have __________

Answer 21

-Unidirectional -Regional specialization (digestive organs)

Question 22

The excretory system of annelids is consists of _____________

Answer 22

paired (metameric) metanephridia

Question 23

Annelids: Excretory tubes with ____________ that removes waste from the coelomic fluid; open to the outside via ____________

Answer 23

-ciliated funnel -excretory pore

Question 24

Some species of annelid have ___________ segments

Answer 24

gonad specific segments

Question 24

The sexes of annelids is usually separated with ______ occurring in each segment

Answer 24

gonads

Question 25

Breeding of annelids is usually _________

Answer 25

seasonal (Autumn or spring)

Question 26

As the gametes of an annelid mature they fill the coelom and are released by ____________

Answer 26

nephridia

Question 27

Fertilization of annelids can be _______ or _____

Answer 27

internal or external

Question 28

_____________ develop, which are remarkably similar to the molluscs

Answer 28

Trochophore larvae

Question 29

Annelids are found in the ______, ________ and ________

Answer 29

-Ocean -freshwater -terrestrial soils

Question 30

Annelids often live in _______ and feed on ________ in the soil

Answer 30

-burrows in the ground -organic matter

Question 31

Other annelids feed on suspended particles that are trapped on ___________

Answer 31

parapodia

Question 32

Some annelid are _______, and hunt by hiding in rocks and corals ambushing their prey

Answer 32

Predaceous

Question 33

Other annelids are _______________. Example are leeches

Answer 33

bloodsucking carnivores

Question 34

-Name means "many + long hairs" -many setae per body segment -mostly marine and dioecious -most segments with parapodia used for crawling, swimming, feeding, and respiration

Answer 34

Class Polychaeta

Question 35

Example of annelids under class polychaeta

Answer 35

-clam worm -scale worm -fireworm -fanworm (featherdusters)

Question 36

-name means "few + long hairs" -few setae per body segment -terrestrial and freshwater -no head or parapodia -coelom divided by septa -hermaphroditic

Answer 36

Class Oligochaeta

Question 37

-name means leeches -mostly freshwater, some marine and terrestrial -body usuallt with posterior and anterior suckers that secretes anticoagulants and consume blood. -No parapodia or setae -Clitellum present -Hermaphroditic

Answer 37

Class Hirudinea

Question 38

Example of annelid in class oligochaeta

Answer 38

Lumbricus terristris (earthworm)