Please enable JavaScript.
Coggle requires JavaScript to display documents.
Invertebrates (Worms (Three types (Annelids (Characteristics
Segments
…
Invertebrates
Worms
Three types
Annelids
- Characteristics
- Segments
- Shaped like rings
- Very long
- Digestive truks start in mouth to anus
- Skin always moist due to viscous substance
- Structure chaetae long and thin like the hair use for move
- Live in aquatic environments, some in damp soil
Three types
Leeches
- Damp land environments or fresh water
- Body: two suckers
- No chaetae
- Feed blood of its prey
- Earthworms
- Formed by rings
- Few chaetaes
- Damp environments
- Grouped differents areas on their body
- Sandworms and lugworms
- Live holes or tubes that they make in the sea or lakes
- Head: eyes, antenna
- Body: long, abundant chaetae
- Breathe by gills
Nematodes
- Characteristics
- Very thin
- Differents species
- Live damps areas
- Parasites
- Cause diseases
Examples
- Intestinal worms
- Trychine ( trichinosis)
-
-
Cnidaria
- Characteristics
- Radial symmetry
- Live in seas
- Varied sizes( metres millietres)
Two types
Jellyfish
- Characteristics
- Have soft body
- Shape of umbrella (Bell)
- Tentacles (stinging cells) come out the bell
- Mouth under the bell
- Move by tentacles or float on the current
Polyps
- Characteristics
- Body like a sac
- Hole in the top (mouth)
- Tentacles (stinging cell) around the mouth
- Live alone or be grouped in colonies
- Never float, always are in a surface
- Soft body
- Some polyps (coral) have hard structure
Porifera
- Characteristics
- Invertebrates called sponges
- Live in seas
- Attached to the rocks.
- Irregular shape
- Can measure metre long or few milimetres
- Tiny holes
- One or two large orifices called osculum
- Set of interconnecting channels and chambers inside.
- Feed by bacteria and remains of larger organisms.