You spent time in a body of freshwater in the tropics and sometime later become fatigued and develop nerve cord lesions. Your doctor discovers eggs in your feces which contain embryonated eggs (egg capsule containing a miracidium larva). This means you have been infected by a cestode a trematode blood fluke a tape worm a trematode liver fluke
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
Q54
Answer
The classes Cestoda, Trematoda belongs to the phylum Platyhelminthes. It consists of organisms that are parasites. For examples class, Cestoda has Taenia solium (Pork tapeworm), Taenia saginata (beef tapeworm). The class Trematoa has Fasiola - the liver fluke and Schistosoma- the blood fluke.
Nematodes belong to the Phylum Aschelmenthes. It involves roundworms. For example Ascaris lumbricoides.
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