The Phylum Nematoda
A Brief Overview
Nematoda are among the most abundant animals on the planet, as they can survive as parasites in animals and plants, or in free living forms in soil, fresh water and marine enviornments. There are about 20,000 named species of nematoda. Nematoda are bilaterally symetrical, and are surrounded by a strong outer layer called a cuticle. Nematoda move by the contraction of longitudinal muscles. Many nematodes play critical roles in the enviornment as decomposers, but can also lead to the cause of many diseases. Similar to Porifera, Nematodes do not possess a defined circulatory system, but instead depend upon their psueddocoel fluids to accomplish circulation. However, Nematodes are slightly evolved from Porifera, as there is a presence of a circulatory system in Nematodes, where in Porifera, there is a water current, rather than a current of blood being pumped through the body.
Nematoda are among the most abundant animals on the planet, as they can survive as parasites in animals and plants, or in free living forms in soil, fresh water and marine enviornments. There are about 20,000 named species of nematoda. Nematoda are bilaterally symetrical, and are surrounded by a strong outer layer called a cuticle. Nematoda move by the contraction of longitudinal muscles. Many nematodes play critical roles in the enviornment as decomposers, but can also lead to the cause of many diseases. Similar to Porifera, Nematodes do not possess a defined circulatory system, but instead depend upon their psueddocoel fluids to accomplish circulation. However, Nematodes are slightly evolved from Porifera, as there is a presence of a circulatory system in Nematodes, where in Porifera, there is a water current, rather than a current of blood being pumped through the body.
![Picture](/uploads/2/0/0/6/20069161/5722993.jpg)
Ancylostoma duodenale (Hookworm)
Like most species of nematodes, there is not a strong presence of a circulatory system in Ancylostoma duodenale. Ancylostoma duodenale mainly rely on their psueddocoel fluids to help achieve circulation in the body to promote respiration and movement. Ancylostoma duodenale are a very common species of nematodes, and their circulatory system shares traits with that of many other species. Also, Ancylostoma duodenale do not have hearts.
Like most species of nematodes, there is not a strong presence of a circulatory system in Ancylostoma duodenale. Ancylostoma duodenale mainly rely on their psueddocoel fluids to help achieve circulation in the body to promote respiration and movement. Ancylostoma duodenale are a very common species of nematodes, and their circulatory system shares traits with that of many other species. Also, Ancylostoma duodenale do not have hearts.
![Picture](/uploads/2/0/0/6/20069161/1819030.jpg)
Lagochilascaris minor
Lagochilascaris minor is very similar to Ancylostoma duodenale due to the fact that they both do not use a circulatory system. Also, both do not have a heart, and rely greatly on psueddocoel fluids to help the body circulate.
Lagochilascaris minor is very similar to Ancylostoma duodenale due to the fact that they both do not use a circulatory system. Also, both do not have a heart, and rely greatly on psueddocoel fluids to help the body circulate.
![Picture](/uploads/2/0/0/6/20069161/9257253.jpg)
Parascaris equorum (Roundworms)
Like Ancylostoma duodenale, Parascaris equorum share its characteristics of the circulatory system with that of the other species of nematodes. It uses psueddocoel fluids to help circulation throughout the body, and allow its self to go through the processes of respiration and moving. Similar to hookworms, roundworms do not have a heart to help circulation.
Like Ancylostoma duodenale, Parascaris equorum share its characteristics of the circulatory system with that of the other species of nematodes. It uses psueddocoel fluids to help circulation throughout the body, and allow its self to go through the processes of respiration and moving. Similar to hookworms, roundworms do not have a heart to help circulation.