Zoology

Zoology Notes

Hydra- Habit, Habitat, External Morphology, Internal Structures

by
Hydra- Habit, Habitat, External Morphology, Internal Structures

Hydra are inconspicuous freshwater relatives of corals, sea anemones, and jellyfish that are classified under the phylum Cnidaria, Class Hydrozoa, Order Anthomedusae/Anthoathecata, and Family Hydroidea. It is essentially a sedentary organism living attached to stones, pebbles, and water plants, but can get released from the substratum and swim. The name Hydra was …

Read moreHydra- Habit, Habitat, External Morphology, Internal Structures

Wuchereria bancrofti- Habitat, Morphology and Life Cycle

by
Wuchereria bancrofti- Habitat, Morphology and Life Cycle

Wuchereria bancrofti is a filarial nematode that causes Wuchereriasis or filariasis(commonly called elephantiasis) in human beings. The name of this worm is given Wuchereria bancrofti in honor of the two scientists Wucherer and Bancroft who made a considerable contribution in studying the disease caused by these worms. Image Source: Study and Score and …

Read moreWuchereria bancrofti- Habitat, Morphology and Life Cycle

Earthworm- Reproductive System, Copulation, Cocoon formation

by
Reproductive system of earthworm

Reproductive system of earthworm Earthworms do not reproduce asexually. Reproductive organs are somewhat complicated. The pheretima is monoecious or hermaphrodites having both male and female reproductive organs in the same individual. They cannot fertilize their own eggs because they are protandrous. Cross-fertilization occurs as a rule because of the relative position of …

Read moreEarthworm- Reproductive System, Copulation, Cocoon formation

Amoeba proteus- Nutrition, Respiration, Excretion, Osmoregulation

by
Amoeba proteus- Nutrition, Respiration, Excretion and Osmoregulation

Nutrition of Amoeba proteus Food and selection of food Amoeba is carnivorous. It feeds by phagocytosis. The mode of nutrition is Zootrophic or holozoic. i.e. it requires ready-made (solid form) organic substances for food. The food consists of algal cells and filaments, bacteria, desmids, flagellates, ciliates, small metazoans such as rotifers and …

Read moreAmoeba proteus- Nutrition, Respiration, Excretion, Osmoregulation

Amoeba proteus- Habitat, Culture and Structures

by
Amoeba proteus- Habitat, Culture and Structures

Classification of Amoeba proteus Phylum: Protozoa Subphylum: sacromastigophora Superclass: Sarcodina Class: Rhizopodea Subclass: Lobosia Order: Amoebida Genus: Amoeba Species: proteus Habit and Habitat of Amoeba proteus Amoeba proteus is widely distributed and commonly found on the bottom mud or on the underside of aquatic vegetation in freshwater, ponds, ditches, lakes, springs, slow-running …

Read moreAmoeba proteus- Habitat, Culture and Structures

Reproduction in Paramecium

by
Reproduction in Paramecium

Paramecium reproduces asexually by transverse binary fission and also undergoes several types of nuclear reorganization, such as conjugation, endomixis, autogamy, cytogamy, and hemixis, etc. 1.  Transverse binary fission (Asexual reproduction) This is the commonest type of Asexual reproduction in Paramecium. It occurs during the favorable condition when food is available in large …

Read moreReproduction in Paramecium

Paramecium caudatum- Habitat, Culture, Structure, Locomotion

by
Paramecium caudatum- Habitat, Culture, Structures, Locomotion

Habit and Habitat Paramecium caudatum (Gr., paramekes=oblong+ L., caudata=tail) is a free-living organism which is one of the most common species of Paramecium having worldwide distribution. It is commonly found in freshwater, ponds, pools, ditches, streams, lakes, reservoirs, and rivers. It is usually found abundant in water containing decaying organic matters, in …

Read moreParamecium caudatum- Habitat, Culture, Structure, Locomotion

Excretory or Nephridial System of Earthworm

by
Excretory or Nephridial System of Earthworm

The excretory organs are segmentally arranged, microscopic, coiled tubules called nephridia. Nephridia are ectodermal in origin. These are typically unbranched, and their inner ends open into coelom by a ciliated funnel, called nephrostome. A large number of small-sized nephridia are found in each segment which are called micronephridia and mesonephridia. Nephridia occur …

Read moreExcretory or Nephridial System of Earthworm

Circulatory system of earthworm

by
Circulatory system of earthworm

Circulatory system of earthworm The circulatory or blood vascular system of an earthworm is a closed type. It consists of the blood vessel, heart, capillaries, and blood glands. Blood is composed of fluid plasma and colorless corpuscles. Blood is red in color due to the presence of respiratory pigment hemoglobin (erythrocruorin) in …

Read moreCirculatory system of earthworm