Advertisement

14, Apr, 2017
Read 920 times

General Characters of Protozoa

Written by  on Friday, 14 April 2017 22:56
  • RATE THIS ARTICLE
    (0 votes)

General Characters of Protozoa General Characters of Protozoa

Advertisement
Introduction
 
Leuwenhoek first described the protozoan animals under a microscope, he called them animalcules. In 1871 Gold fuss gave the name PROTOZOA The term protozoa means primitive animals. Protozoans are present from Precambrian period to recent times 50.000 species are included in this Phylum.

General Characters:

  1. Protozoa Body all protozoans are unicellular Hyman called them accelular.
  2. Protozoa Symmetry: will show radial symmetry in some organisms, bilateral symmetry in some organisms& some organisms are asymmetrical.
  3. Protozoan’s may live singly or some are colonial.
  4. Protozoa body wall: these animals body covered by cell membrane which contain proteins and lipids.
  5. Some animals may be covered by Pellicle. Some animals covered by shell Ex : Elphidium.
  6. Protozoa Osomo Regulation :In fresh water animals contractile vacuole is present. It is useful for osomo regulation. in marine and parasitic protozoans contractile vacuole is absent.
  7. Food vacuole will work as temporary stomach.
  8. Locomotion Protozoa: protozoa amimals will show locomotory organelles like flagella. pseudopodia.cilia etc.
  9. Nutrition in protozoans is by holozoic, holophytic. saprophytic, coprozoicetc.. Some protozoans are parasites.
  10. Respiration is by diffusion
  11. Excretion is by diffusion
  12. In Protozoa Asexual Reproduction is by binary fission, multiple fission, budding etc.,
  13. In Protozoa Sexual Reproduction is by syngamy. Conjugation etc.
  14. During unfavorable condition - the protozoa’s will develop cyst around themselves.
  15. In some the life cycle is complicated with asexual and sexual phases
Advertisement
Advertisement

Additional Info

Last modified on Friday, 14 April 2017 23:15
BS Media

BS Media is the group of authors and reporters of BIOSCIENCE PAKISTAN which get you to the breaking news about health and biology recent trends and updtaes.

RELATED TOPICS


  • Dictionary:

    Our Sponsors

    We use cookies to improve our website. By continuing to use this website, you are giving consent to cookies being used. More details…