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Worms
Mateo Sesma Castel-Ruiz
Created on November 26, 2024
Explication of what are worms.
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Transcript
WORMS
Start
Mateo, Samuel and David.
INDEX:
Home
1- Habitat
2- Symmetry
3- Body characteristics
4- Classification
5- Vital Functions
6- Where we have taken the information.
HABITAT
They are terrestrial and they normally live in compost-rich soil.
Some are aquatic.
TYPE OF SYMMETRY
They all have bilateral symmetry.
BODY CHARACTERISTICS
They dont have articulated appendages.
They are long and soft without an internal skeleton.
VITAL FUCTIONS
Nutition:
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
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.
Subtitle
VITAL FUNCTIONS:
Interaction:
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.
Annelids: They have hard hairs in their skin Nematodes: They have sense organs and some adults have hooks or teeth at the head
VITAL FUNCTION
Reproduction:
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
Annelids: The majority reproduce sexually.Sexual reproducction.Oviparous Nematodes: They uswally reproduce sexually.Sexual reproducction.Oviparous
Groups of classification
Platyhelminthes
Nematodes
Annelids
CLASSIFICATION
Platyhelminthes
-Two of the most well-known groups of Platheliminthes are: - Tapeworms- Planarians
- Are the siplest animals that have cephalisation.
- They have long flat bodies diveded into segments.
Classification
Nematodes:
- Most are free-living and have a cilindrical body and don't have segmented bodies.
- Some are parasites like: - Pinworms -Whipworms -Heartworms.
Classification
Annelids:
- Live in aquaic enviroments and in moist land enviroments.
- Have cylindrical bodies that are diveded into segments (are colled metameres with most of the organs repeated).