| A | B |
|---|
| What Kingdom do the earthworms belong in? | Kingdom Animalia |
| What subkingdom do the earthworms belong in? | sub kingdom Eumetazoa |
| What Phylum do the earthworms belong in? | Phylum Annelida |
| What Class do the earthworms belong in? | Class Oligochaeta |
| how many different species are there of earthworms? | 100 different species |
| habitat of earthworm | fresh water, marine water, terrestrial |
| how many segments does the earthworm contain | over 100 |
| What is the Clitellum | fused body segments |
| Cephalization | sense organs concentrated at the anterior end |
| What is the importance of cephalization | Allows the earthworm to test its environment before exposing its entire body to harm |
| WHat is cephalization good for? | burrowing |
| muscular system | well developed |
| 3 types of muscles | longitudinal, circular, oblique |
| what is the longitudinal muscle good for? | shortens and thickens body |
| What is the oblique muscle good for | allows the body to twist |
| What is the circular muscle good for? | lengthen and thins body |
| what are the 2 parts of the excretory system | nephridia and castings |
| nephridia | organs that expel liquid waste products |
| castings | solid waste producets excreted from anus |
| what is the earthworm's nutrition | eats organic particles in soil |
| List the organs of digestion in sequence | mouth, pharynx, esophagus, crop, gizzard, intestine, anus |
| how do earthworms breath | by diffusion of oxygen through their moist skin |
| aortic arches | 5 "hearts" |
| dorsal blood vessel | takes blood from posterior to anterior end (from tail to head, found on back side) |
| ventral blood vessel | takes blood from anterior end to posterior end (from head to tail, found on stomach side) |
| ganglion | nearves fused at the anterior end to form a "brain" |
| ventral nerve cord | two fused nerves extending from the ganglion |
| what is the ventral nerve cord sensitive to | touch, vibration, temperature, chemicals, light, moisture |
| what is a worm's favorite color? | red- a red light attracts worms |
| what type of reproductive system do worms have | hermaphroditic |
| hermaphroditic | each worm has a complete set of male and female reproductive parts |
| why does the worm require a partner to fertilize even though it is hermaphroditic? | for genetic variety |
| what forms storgae area for eggs and sperm | clitellum |
| where is sperm stored | in seminal receptacles |
| slime ring | covers and protects the fertilized eggs in the soil |
| what makes a slime ring | clitellum |
