Displaying articles by tag: Zoology Notes

BS Media in Zoology
Friday, 10 July 2009 20:50

COMPARATIVE ANATOMY: PELVIC GIRDLE OF BIRD, REPTILE AND MAMMAL

The pelvic girdle is directly attached to the vertebral column in the sacral region. The pelvic girdle consists of two similar halves which are known as ossa innominata. Each os innominatum is. formed by three bones. The dorsal bone is known as ilium, antero-Ventral bone is named as pubis and…

  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Comparative Anatomy
  • Pelvic Girdle of Bird
  • Pelvic Girdle of Reptile
  • Pelvic Girdle of Mammal
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BS Media in Zoology
Friday, 10 July 2009 18:18

COMPARATIVE ANATOMY: PELVIC GIRDLE OF FROG AND SHARK

The hip or pelvic girdle' is present in the posterior side of the body to which the pelvic fins or hind limbs are attached. The pelvic girdle is connected directly to the vertebral column in the sacral region. The pelvic girdle has two equal halves which are known as 'ossa…

  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Pelvic Girdle of Frog
  • Pelvic Girdle of Fish
  • Comparative Anatomy
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BS Media in Zoology
Tuesday, 14 April 2009 12:13 Featured

LIFE HISTORY OF POLYSTOMELLA (ELPHIDIUM)

Life history of Polystomella shows alternation of generations (Sexual method of reproduction will alternate with asexual method of reproduction).   Elphidium-Asexual reproduction :   In Elphidium microspheric form takes up asexual reproduction by multiple fission. The nuclei break into many Chromatin bits. They become round. They are covered by bits of cytoplasm. Several amoeboid…

  • Zoology
  • Zoology Notes
  • Article
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BS Media in Zoology
Tuesday, 14 April 2009 12:01 Featured

STRUCTURE OF POLYSTOMELLA (ELPHIDIUM)

Elphidium is a marine form. It is found creeping on Sea weeds to a depth of 300fathoms Phylum : Protozoa Class : Rhizopoda Order : Foraminifera.   Structure   Elphidium is also called 'Polystomella is a 'dimorphic rhizopod'. It is a unicellular microscopic protozoan, and" 1 mm in diameter It is…

  • Zoology
  • Zoology Notes
  • Article
  • Anatomy
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BS Media in Zoology
Tuesday, 14 April 2009 11:39 Featured

AN INTRODUCTION TO PROTOZOA

Protozoa = First animals ("Protos" = first, "Zoon" = animal)   Protozoans were not seen until the invention of microscope (possibly as early as 1590). In 1676 Leeuwenhock first described microscopic animals and called them animal-cules. Lendermuller (1760-63) gave the name of Infusoria and kept these animals in that group.…

  • Zoology
  • Zoology Notes
  • Article
  • Introduction to Protozoa
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BS Media in Zoology
Tuesday, 14 April 2009 11:07 Featured

SCOLIODON - INTERNAL EAR

In Shark 3 pair of internal ears are present. They are organs of equilibrium and hearing. The middle and external ears are absent. The internal ear is a complex structure. It is called the membranous labyrinth. It is present in the auditory capsule of the cranium. It is covered by…

  • Zoology
  • Zoology Notes
  • Article
  • Anatomy
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BS Media in Zoology
Tuesday, 14 April 2009 08:38 Featured

STRUCTURE OF SHARK EYES

SHARK EYE (SCOLIODON EYE) – ANATOMY   Shark two eyes are present on the head. They are located in the orbits and are laterally directed.   The eye is large in size and elliptical body. It is a hollow structure. It is covered by three coats.   1) The fibrous…

  • Zoology
  • Zoology Notes
  • Article
  • Anatomy
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BS Media in Zoology
Tuesday, 14 April 2009 08:21 Featured

CRANIAL NERVES OF SCOLIODON (SHARK)

Ten pairs of cranial nerves arise from the brain at different locations to supply the anterior region of the body. In addition to them a pair of terminal or pre olfactory nerves (zero nerves) arises from the ventral surface of the cerebrum. The ten pairs of cranial nerves are furnished…

  • Zoology
  • Zoology Notes
  • Article
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BS Media in Zoology
Tuesday, 14 April 2009 07:54 Featured

COMPARATIVE ANATOMY: LIZARD BRAIN, BIRD BRAIN AND RABBIT BRAIN

BRAIN OF CALOTES (GARDEN LIZARD)    BRAIN OF COLUMBA (PIGEON)   BRAIN OF ORYCTOLAGUS (RABBIT) 1. Brain of lizard is relatively small and simple in proportion to the body.   1. Avian brain is much more developed.   1. Mammalian brain is very large and is most advanced in the…

  • Zoology
  • Zoology Notes
  • Article
  • Comparative
  • Comparative Account
  • Comparative Anatomy
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Sahir Roy in Zoology
Monday, 13 April 2009 18:01 Featured

COMPARISION: Female Reproductive System of Bird, Rabbit and Reptile

FEMALE REPRODUCTIVE SYSTEM - CALOTES  FEMALE REPRODUCTIVE SYSTEM - PEGION FEMALE REPRODUCTIVE SYSTEM - RABBIT 1. On the right and left sides two ovaries are present. 1. Only left ovary is present. A vestige of right ovary may occur. 1. A pair of ovaries are present on the left and…

  • Zoology Notes
  • Zoology
  • Article
  • Comparative Account
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Sahir Roy in Zoology
Monday, 13 April 2009 17:14 Featured

COMPARISION: Male Reproductive System of Bird, Rabbit and Reptile

MALE REPRODUCTIVE SYSTEM OF CALOTES (GARDENLIZARD) MALE REPRODUCTIVE SYSTEM OFCOLUMBA (PIGEON) MALE REPRODUCTIVE SYSTEM OFORYCTOLAGUS (RABBIT) 1. Testes are white ovoid bodies. 1. Testis white ovoid bodies. 1. Testes are pink, ovoid bodies. 2. Testes lie in the abdominal cavity much ahead of kidneys. Inguinal canal is absent. 2. Testes…

  • Zoology
  • Article
  • Zoology Notes
  • Notes
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