Worms

Mateo, Samuel and David.

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WORMS

6- Where we have taken the information.

4- Classification

5- Vital Functions

3- Body characteristics

2- Symmetry

1- Habitat

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INDEX:

Some are aquatic.

HABITAT

They are terrestrial and they normally live in compost-rich soil.

TYPE OF SYMMETRY

They all have bilateral symmetry.

They are long and soft without an internal skeleton.

They dont have articulated appendages.

BODY CHARACTERISTICS

Annelids: Annelids have a digestive tube with a mouth and an anus. Nematodes Nematodes don't have a stomach,food traves from the mouth directly to the intestine and out of the anuras.

Tapeworms: They don't have a mouth,instead they absorbs nutrients from the animal's intestine. Planarians: Their digestive cavity has only one orifice in the middle of their underside

Nutition:

VITAL FUCTIONS

Subtitle

Annelids: They have hard hairs in their skin Nematodes: They have sense organs and some adults have hooks or teeth at the head

Tapeworms: Some have hooks or suckers to anchor themselves to the host Planarians: They have eye spots that can detect changes in the intensity of light.

Interaction:

VITAL FUNCTIONS:

Annelids: The majority reproduce sexually.Sexual reproducction.Oviparous Nematodes: They uswally reproduce sexually.Sexual reproducction.Oviparous

Tapeworms: They're hermaphrodite and they can selffertilise,cross-fertilisation is more common.Sexual reproducction.Oviparous Planarians: There are sexual and asexual planarians.Sexual planarians are hermaphrodites.Sexual reproducction.Oviparous

Reproduction:

VITAL FUNCTION

Groups of classification

Annelids

Nematodes

Platyhelminthes

- They have long flat bodies diveded into segments.

- Are the siplest animals that have cephalisation.

-Two of the most well-known groups of Platheliminthes are: - Tapeworms- Planarians

Platyhelminthes

CLASSIFICATION

- Some are parasites like: - Pinworms -Whipworms -Heartworms.

- Most are free-living and have a cilindrical body and don't have segmented bodies.

Nematodes:

Classification

- Have cylindrical bodies that are diveded into segments (are colled metameres with most of the organs repeated).

- Live in aquaic enviroments and in moist land enviroments.

Annelids:

Classification

1- From the book.2- From wikipedia: (https://es.wikipedia.org/wiki/Wikipedia:Portada )

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