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Zoology

Balanoglossus will show open type of blood vascularsystem. It shows   Blood Dorsal sinus Heart…
Monday, 05 June 2017 16:23

RESPIRATION MECHANISM IN BALANOGLOSSUS

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Balanoglossus lives in burrows in the intertidal sandy areas. Its body is long cylindrical. In…
Monday, 05 June 2017 16:09

DIGESTIVE SYSTEM OF BALANOGLOSSUS

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Balanoglossus is a worm like chordate animal. It is cylindrical organism and lives in burrows…
Monday, 05 June 2017 15:51

ANATOMY OF BALANOGLOSSUS

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INTERNAL STRUCTURES AND BODY WALL OF BALANOGLOSSUS Balanoglossus is a long cylindrical worm like hemichordate…
Balanoglossus is a worm like Protochordate organism. It belongs to Phylum: Chordata Subphylum: Hemichordata Order:…
Monday, 05 June 2017 14:40

WATER VASCULAR SYSTEM IN DIFFERENT ECHINO­DERMS

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Water vascular system (or) Ambulacral system is a peculiar system which is seen in only…
Echinodermata means spiny skinned animals. This name was first proposed by Jacob Kelin (1734) for…
Monday, 05 June 2017 13:33

FORMS OF ECHINODERMATA LARVA

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Echinoderms are unisexual animals. Sexual dimorphism is absent. Fertilisation takes place in water. The development…
Monday, 05 June 2017 12:18

FERTILIZATION AND DEVELOPMENT IN STAR FISH

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Star fish is unisexual. Male and female animals are separate. Sexual dimorphism is not seen.…
Monday, 05 June 2017 11:41

NERVOUS SYSTEM AND SENSE ORGANS OF STAR FISH

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In Star fish the nervous system is primitive and diffuse type. It has no ganglia.…
Monday, 05 June 2017 11:25

BLOOD VASCULAR SYSTEM IN STAR FISH

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A true blood vascular sys­tem is absent. In star fish, this system circulates digested food…
Monday, 05 June 2017 11:09

WATER VASCULAR SYSTEM IN STARFISH

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In Echinoderms a peculiar system is met with. It is filled with sea water, it…
Starfish shows an alimentary canal extending from oral to aboral side. It shows the following…
The body wall of star fish consists of 1. Epidermis 2. Dermis 3. Muscles and…
Monday, 05 June 2017 09:19

STAR FISH - GENERAL CHARACTERS

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Introduction   Star fish or Sea star is common echinoderm in the sea water. Its…
Monday, 05 June 2017 09:03

INTRODUCTION TO PHYLUM ECHINODERMATA

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Jacob Klein (1734) first used the term Echinodermata for sea urchins. Linnaeus in 1758 placed…
Monday, 05 June 2017 08:52

EXCRETORY SYSTEM IN UNIO

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The excretory system of Unio includes a pair of kidneys (organs of Bojanus) a pericardial…
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