Annelids Flashcards
1
Q
Annelids
A
Segmented Worms, Earthworms, Leeches
2
Q
Symmetry?
A
Bilateral Symmetry
3
Q
Coelom?
A
Coelom
4
Q
Earthworm’s ecological role?
A
Burrows in the ground and creates tunnels that aerate the soil
5
Q
Digestion?
A
- Complete digestive tract
- Mouth ingests decaying organic matter along with soil
- Mouth - esophagus - crop - gizzard - Intestine - Anus
6
Q
crop
A
Where food is stored
7
Q
Gizzard
A
Consists of thick muscular walls and grinds up food
8
Q
Typhlosole
A
A large fold in the upper surface of the intestine; increases surface area
9
Q
Gas exchange
A
- Diffusion through moist skin
- external respiratory surface
10
Q
Circulatory system
A
- 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
Q
Brain
A
Consists of 2 dorsal, solid, fused ganglia hat connect to a solid, ventral nerve cord
12
Q
Nephridia
A
Paired in every body segment to remove urea
13
Q
Reproduction
A
Hermaphrodite
