Here students can locate TS Inter 1st Year Zoology Notes 5th Lesson Locomotion and Reproduction in Protozoa to prepare for their exam.
TS Inter 1st Year Zoology Notes 5th Lesson Locomotion and Reproduction in Protozoa
→ Locomotion is defined as the voluntary movement of an organism from one place to another either in search of food or shelter or mate or to escape from the predators.
→ Locomotory structures may also be used for the collection of food. (eg:Amoeba & Paramoecium use pseudopodia and cilia for the collection of food also).
→ “All locomotions are movements, but all movements are not locomotions.
→ The method of locomotion performed by animals varies with their habitats and the demand of the situation.
→ Reproduction is defined as a biological process in which an organism gives rise to young ones similar to itself.
→ There is a cycle of birth, growth and death.
→ Reproduction enables the continuity of the species, generation after generation.
→ The organism’s habitat, its internal physiology and several other factors are collectively responsible for its mode of reproduction.
→ Based on the participation of one organism or two in the process of reproduction, it is of two types, asexual and sexual.
→ Giardia Lamblia:
Giardia Lamblia (synonymous with Giardia intestinalis, Lamblia intestinalis and Giardia duodenalis) is a flagellated protozoan parasite that colonizes and reproduces in the small intestine, causing giardiasis. The giardia parasite attaches to the epithelium by a ventral adhesive disc, and reproduces via binary fission.
Giardiasis does not spread via the bloodstream, nor does it spread to other parts of the gastro-intestinal tract, but remains confined to the lumen of the small intestine. Giardia trophozoites absorb their nutrients from the lumen of the small intestine, and are anaerobes. If the organism is split and stained, it has a very characteristic pattern that resembles a familiar “smiley face” symbol. Chief pathways of human infection include ingestion of untreated sewage, a phenomenon particularly common in many developing countries; contamination of natural waters also occurs in watersheds where intensive grazing occurs.