Do flatworms have a head?

Do flatworms have a head?

Flatworms’ bodies are bilaterally symmetrical and they have a defined head and tail region. They have a central nervous system containing a brain and a nerve cord. Clusters of light-sensitive cells on either side of their head make up what are called eyespots.

What are the two most obvious characteristics of flatworms?

The main characteristics of flatworms (Figure below) include: Flatworms have no true body cavity, but they do have bilateral symmetry. Due to the lack of a body cavity, flatworms are known as acoelomates. Flatworms have an incomplete digestive system.

How would you differentiate a free living worms from a parasitic worms?

Free-living nematodes feed on organisms in their environment. Parasitic types feed off of a host and some also live within the host. The majority of nematodes are non-parasitic.

What makes a good parasite?

Most trypanosomatid parasites have both arthropod and mammalian or plant hosts, and the ability to survive and complete a developmental program in each of these very different environments is essential for life cycle progression and hence being a successful pathogen.

How can you tell if an organism is a parasite?

Symptoms that might occur include:

1. skin bumps or rashes.
2. weight loss, increased appetite, or both.
3. abdominal pain, diarrhea, and vomiting.
4. sleeping problems.
5. anemia.
6. aches and pains.
7. allergies.
8. weakness and general feeling unwell.

Is there a good parasite?

While they lead grisly lives and often aren’t the most attractive creatures, parasites can actually be good for our health and some even moonlight as crime-fighters.

Why is female mosquito not a parasite?

Complete answer: -A female mosquito though feeds on blood and in the case of Anopheles mosquitoes it is even a cause of malarial disease, still is not considered as a parasite because the mosquito feeds on human blood for reproduction and not for its survival.

What are the most dangerous parasites?

Grab on to a list of some of the most dangerous parasites on Earth:

• Brain-eating amoeba, Naegleria fowleri.
• Castrator of Crabs, Sacculina.
• Tissue eating Parasite, Cochliomyia.
• Lung worm, Cryptostrongylus pulmonic.
• Eye dwelling parasite, Loa loa.
• Spirometra erinaceieuropae.
• Dragon worm, Dracunculus.

What is the scariest parasite?

10 deadly parasites

• The zombie wasp – Ampulex compressa.
• The tongue-eating sea louse – Cymothoa exigua.
• The eye worm – Loa loa.
• The dragon worm – Dracunculus.
• The head-splitting fungus – Cordyceps fungi.
• The sex-change bacteria – Wolbachia.
• The mind-control bug – Toxoplasma gondii.
• The womb-hijacking barnacles – Sacculina.

Can a Bobbit worm eat a human?

They’re one of the most weaponised fish out there, with venom-laced spines powerful enough to bring down a human – but this one barely even struggled. (Note: The video above says bobbit worms don’t have brains, but that isn’t entirely correct.

Is Bobbit worm dangerous?

This is Eunice aphroditois, also known as the bobbit worm, a mix between the Mongolian death worm, the Graboids from Tremors, the Bugs from Starship Troopers, and a rainbow — but it’s a really dangerous rainbow, like in Mario Kart.

How long does a Bobbit worm live?

The lifespan of E. aphroditois is believed to be three to five years.