Why are there typically many small sized organisms at low trophic levels and fewer large sized organisms at higher trophic levels in a community?
– In some ecosystems, a smaller number of large organisms at a lower trophic level support a larger number of small organisms at higher trophic levels. – Due to the larger size of the organisms, there is more biomass and energy at the lower trophic level than at the higher ones.
In what way is the annelid digestive tract different from the digestive systems of cnidarians and flatworms?
In what ways is the annelid digestive tract different from the digestive system of cnidarians and flatworms? They became flexible, nervous system, circulatory system, digestive system, a lot of different body plans.
What is the main advantage of a digestive tract having a separate entrance and exit from P 193?
What are the advantages of a digestive tract having a separate entrance and exit? It doesn’t have to wait until it has vomited the waste from its last meal before it can eat again.
How does the shape of Schistosoma differ from that of other flukes that we have studied?
How does the shape of Schistosoma differ from that of other flukes you have studied? Schistosoma differs from other flukes due to their gender. This is because they are male and female in separate individuals. This is known as dioecious, and both of the bodies of male and female differ.
What are disadvantages of a flatworm digestive system having one opening?
The main disadvantage of a digestive system like this is that there is only one opening where the food enters and leaves. Therefore the organism, in our case, the flatworm, must wait for the food to be digested and excreted through the opening in order to be able to eat again.
Is Schistosoma a trematode?
Unlike other trematodes, which are hermaphroditic, Schistosoma spp. are dioecous (individuals of separate sexes). In addition, other species of schistosomes, which parasitize birds and mammals, can cause cercarial dermatitis in humans but this is clinically distinct from schistosomiasis.
Where is Schistosoma Haematobium found in the body?
Schistosoma haematobium (urinary blood fluke) is a species of digenetic trematode, belonging to a group (genus) of blood flukes (Schistosoma). It is found in Africa and the Middle East. It is the major agent of schistosomiasis, the most prevalent parasitic infection in humans.
How does Schistosoma enter the body?
Schistosomiasis is a disease that is caused by parasites (genus Schistosoma) that enter humans by attaching to the skin, penetrating it, and then migrating through the venous system to the portal veins where the parasites produce eggs and eventually, the symptoms of acute or chronic disease (for example, fever.
How long does a person live with schistosomiasis?
Schistosomes live an average of 3–10 years, but in some cases as long as 40 years, in their human hosts.
Can worms come out in your pee?
What is urinary schistosomiasis and how is it treated? Urinary schistosomiasis is a disease caused by infection of people with the parasitic worm Schistosoma haematobium. These worms live in blood vessels around the infected person’s bladder and the worm releases eggs which are released in the person’s urine.
Can schistosomiasis be cured?
Schistosomiasis can usually be treated successfully with a short course of a medication called praziquantel, that kills the worms. Praziquantel is most effective once the worms have grown a bit, so treatment may be delayed until a few weeks after you were infected, or repeated again a few weeks after your first dose.
Is schistosomiasis a virus or bacteria?
Schistosomiasis, also known as bilharzia, is a disease caused by parasitic worms. Infection with Schistosoma mansoni, S. haematobium, and S. japonicum causes illness in humans; less commonly, S.
How do you treat schistosomiasis naturally?
If indeed the anti-inflammatory effect of garlic can be shown to help reduce Schistosoma infection in humans, it may offer a valid route forward. Garlic oil may be used as a prophylaxis in areas where the infection is endemic. It may also be used as a means of early treatment in cases where infection is suspected.
Is there a vaccine for schistosomiasis?
Although, there is currently no vaccine available for human use against schistosomiasis, strong evidence from human field studies and experimental animal models of schistosomiasis support the feasibility of developing of an effective vaccine for long term protection [19, 20].
What is schistosomiasis disease?
Schistosomiasis, also known as bilharzia, is a disease caused by parasitic worms. Although the worms that cause schistosomiasis are not found in the United States, people are infected worldwide. In terms of impact this disease is second only to malaria as the most devastating parasitic disease.
How does Schistosoma cause Anaemia?
Schistosomiasis is thought to cause iron deficiency anaemia through intestinal blood loss and blood loss in the faeces and urine. During infection, eggs of the schistomes pass through the intestinal wall and into the gut causing damage and inflammation.
What parasite causes iron deficiency?
The main parasites causing blood loss in man and leading to direct iron-deficiency anemia are the common worm infections. These include hookworm infection (Necator americanus and Ancylostoma duodenale); whipworm infection (Trichuris trichiura); and schistosomiasis (Schistosoma mansoni, S.
What parasites cause anemia?
Iron-deficiency anemia resulting from chronic intestinal blood loss due to hookworm infection often causes long-term morbidity [40, 41]. Blood loss is caused predominantly by parasite release of coagulases, causing ongoing blood loss in the stool, rather than actual blood consumption by the parasite.