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ANIMAL KINGDOM
Aboral :
It means located away from or on opposite side of the body in the mouth.
Acnidaria –
Hydra, jelly fish
Adoral :
It means located on the same body surface as mouth.
Aerial animal :
Some animals that can fly in the air are called aerial animals.
Agamete :
It is a reproductive body found in mesozoa. It divides by a form of cleavage to produce a daughter individual within the body of the parent.
Amphiblastula :
It refers to flagellated larva found in porifera.
Animals :
A major group of living organisms distinguished from plants (algae, bacteria, fungi and viruses) in having the cell wall either absent of composed of nitrogeneous material. About 1-3 million described species are classified into nonchordates (no backbone) and chrodates (having backbone). Nonchrodates are further divided into various phyla.
Aquatic animals :
The animals which live in water are called aquatic animals.
Benthos :
Those forms which remain attached to stones or some other under water objects are called banthos.
Bipinnaria larva :
It is the larval form found in asteroid echinoderms. It is derived from auricularia but it differs from this in being stronger, more complicated development of ciliated bands.
Biramous :
Having two branches.
Blasiochel :
It is fluid filled cavity. It is also referred to as the Segmentation.
Cavity :
That appears at the early stage in embryonic development as the internal space within the blastula.
Choanocyte :
It is a flagellated collar cell found as a lining of the internal cavities of the Porifera.
Coelom :
Body cavity bounded externally by parietal of peritoneum and internally by visceral layer of peritoneum is called coelon.
Colonial animals :
If more than one individual become associated and live in groups such animals are called colonial animals.
Commensalism :
It is an association when two members neither benefit nor harm each other.
Dectylozoid :
It refers to protective or defensive polyp found in certain colonial coelenterate.
Diploblastic Animals :
The animals which develop from two germinal layers are called diploblastic animals.
External fertilization :
The fusion of gamatic cells occurs outside the body and is known as external fertilization.
Fussorial animal :
Some animals live in the burrows; and are called fussorial animals.
Gonopore :
External apertures of a gonadial duct.
Gonotheca :
It is a cylindrical capsule that encloses the reproductive polyp in certain colonial coelenterate.
Gonozoid :
It refers to the reproductive polyp found in certain colonial coelenterate.
Haemocoel :
The cavity which contains blood is called haemocoelom or haemocoel .
Internal fertilization :
The fusion of gametes which occurs inside the body is called internal fertilization.
Major Phyla :
Porifera sponges, spongilla (5000).
Marine animals :
The animals which live in sea water are termed marine animals.
Mesogloea :
It is the layer in the body wall of coelenterate, that lies between the epidemis and the gastrodermis (endodermis).
Metamorphosis :
The sum of changes which convert larva into an adult are called metamorphosis.
Multicellular animal :
The body of an animal is made up of a large number of cells; they are called multicellular animals.
Nacreous :
An iridescent near inner surface of some bivalve shells.
Nauplusis :
It is the earliest larval stage in crustacean. It is ovoid in shape, unsegmented but having three pairs of appendages.
Nematocyst :
It is the stinging cell found on the tentacles and mesenteries of coelenterates.
Oocyst :
It is an encysted zygote formed by the fusion of gametes in certain parasitic protozoa.
Ootype :
It refers to the specialized part of the oviduct that secretes the shell around the fertilized egg in digenean platyhelminthes.
Ophiopluteus larva :
It is a larval form which resembles the echinopluteus but differs from them in having fewer arms.
Osphraduim :
It refers to sense organs present in certain mollusca. It may be used for detecting sediment in water or may also be chemosensory.
Ossicles :
Calcareous plates that form a skeletal system in the body wall of animals like echinoderms. The plates are closely packed but do not unite to form a continuous shell.
Ostium :
It refers to an opening generally used for perforations in wall of the heart through which blood passes from pericardial sinus.
Oviparous :
The animals which lay eggs.
Ovoviviparous :
The fertilization is internal, animals give birth to young ones.
Parasitism :
It is an association in which one individual (parasite) lives at the expense of other animal (host).
Pelagic :
The free swimming aquatic forms are called pelagic.
Pericardium :
It refers to the cavity wherein the heart is located.
Perioral :
Means surrounding the mouth.
Perisare :
It refers to the horny layer that covers the stem of various colonial coelenterate.
Peristome :
It is a membrane surrounding the mouth.
Phasmid :
It refers to small, pit like sensory structure located in the tail region of certain nematode.
Pinacocyte :
It refers to a flattened cell that forms a covering layer in the body walls of sponges. Since such cells are capable of changing their shapes so they act as a pavement epithelium.
Plankton :
The aquatic forms which are drifted passively by water currents are called plankton.
Planula larva :
These are free swimming larva found in coelenterate.
Pleopod :
It refers to abdominal appendages, found in various crustacean, which are adapted for swimming.
Pneumatophore :
They are bag like structure, filled with gas and acting as a float of certain coelenterate.
Polymorphism :
The occurrence of at least two, generally many, radically different body forms within colonial or social organisms.
Pre-oral :
Means located in front of the mouth.
Pseudocoelom :
It is false coelom the body cavity which is not lined by peritoreal lining is called pseudocoelom
Redula :
These are chitinous ribbons bearing a number of transverse rows of teeth. These are located on the floor of the buccal cavity of most mollusca.
Scleroblast :
It is a type of binucleate cell found in porifera which is responsible for secreting the spicular skeleton.
Scolex :
It is the anterior end or “head” of cestodes.
Scutum :
A body plate, part of exoskeleton of anthropods.
Seyphistoma :
Polyp-like stage in the life cycle of a scyphozoan coelenterate.
Shell beak :
It is the oldest part of the shell in a bivalve mollusk at the tip of each valve near the hinge.
Spongin :
It is a fibrous seleroprotein that forms a skeleton in some sponges.
Sporozite :
Spore produced by multiple fission after sexual reproduction in certain protozoa.
Statocyst :
It refers to a resistant body found in Bryozoa.
Symbiosis :
It is an association in which two individuals mutually benefit each other.
Terrestrial animals :
The animals which live on land are called terrestrial animals.
Torsion :
It refers to twisting of the visceral hump or mass found in most gastropods.
Triploblastic animals :
The animals which develop from three germinal layers are known as triploblastic animals.
Trochophore :
It refers to ciliated larval form found in various invertebrates.
Tube Feet :
These are tentacle like outpushing from the water vascular system that may be used for locomotion in Echinodermatea.
Unicellular animal :
When the body of an animal is made up of single cells it is called unicellular animal.
Veliger :
It refers to the larval form found in the mollusca. It is modified form of the trochophore by the appearance of adult organs and an enlarged cilitated lobe, the velum.
Velum :
A narrow fold or ridge which runs around the edge of the umbrella in the medusa of most Hydrozoa. The tentacle are inserted on this ridge.
Viteline Gland :
It is a reproductive gland that is found in platyhelminthes and is responsible for secreting the egg shell.
Viviparous :
The animals which give birth to young ones.
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