Annelids Flashcards Preview

SAT II BIOLOGY > Annelids > Flashcards

Flashcards in Annelids Deck (13):
0

Annelids

Segmented Worms, Earthworms, Leeches

2

Symmetry?

Bilateral Symmetry

3

Coelom?

Coelom

4

Earthworm's ecological role?

Burrows in the ground and creates tunnels that aerate the soil

5

Digestion?

-Complete digestive tract
-Mouth ingests decaying organic matter along with soil
-Mouth - esophagus - crop - gizzard - Intestine - Anus

6

crop

Where food is stored

7

Gizzard

Consists of thick muscular walls and grinds up food

8

Typhlosole

A large fold in the upper surface of the intestine; increases surface area

9

Gas exchange

-Diffusion through moist skin
-external respiratory surface

10

Circulatory system

-The heart consists of 5 pairs of aortic arches that pump blood through the body in blood vessels
-Closed circulatory system
-Oxygen carried by hemoglobin
-No red blood cells

11

Brain

Consists of 2 dorsal, solid, fused ganglia hat connect to a solid, ventral nerve cord

12

Nephridia

Paired in every body segment to remove urea

13

Reproduction

Hermaphrodite