Introduction to Animal Kingdom:
Animal is either vertebrate or an Invertebrate. This classification of animals is on the basis of presence and absence of vertebral column, generally referred to as backbone or spine in extremely developed animals. Animals which have vertebral column are known as vertebrates. On the other hand, those animals, which don't possess vertebral column, are known as invertebrates. In vertebrates, the Characteristics structure, notochord, develop in the embryonic period and afterward, same in replaced by the series of vertebrate, hardening vertebral column. In Invertebrate animals, notochord never grows. Thus, these are very frequently also designated as non-chordates or achordates.
General Characteristics of Invertebrates:
Invertebrates animals abound in number vary significantly, approx 95% of identified and explained species of living species of animals are invertebrates. They differ in size; few are microscopiclike Protozoans, whereas others are extremely large, like some huge cephalopods. Their shape is uneven and they illustrate different types of symmetry but significant number is Asymmetrical as well. Apart from protozoa other invertebrate phyla illustrates multicellularity. They exhibit various grades of body-organization; Protozoans and poriferans show cellular grade of organism but coelenterates show starting of tissue grade organization that has turn out to be more prominent in higher invertebrates. They integument of invertebrates is easy. The gut may be completely absent, or partly formed or entirely formed. Though, if present, it is all the time dorsal in position. Similarly, if heart is present, it is for all time dorsal in position. Nerve cord is ventral in position and solid in organization. Circulatory system, if present in invertebrates, may be open kind, or closed kind or mixture of both.
Difference between Invertebrates and Vertebrates:
S/N
Higher Invertebrate
vertebrate
1)
Appendages if present are more than pairs.
There are never more than 2 pairs of appendages.
2)
May have non-living exoskeleton
There is always the endoskeleton, composed of living tissues such as cartilage and bones.
3)
The Central nervous system controls solid ganglia connected by nerve bones to form a chain.
Central nervous system is in form of hallow thick-walled tube
4)
The nerve cord lies ventrally to the digestive tract.
Neutral tube lies dorsally to digestive tract.
5)
The respiratory organs usually develop from the ectoderm.
Respiratory organs make in relation to wall of pharynx and comprise of gills or lungs, but gill clefts are present in embryo of all vertebrates.
6)
The circulatory system is usually not closed.
Circulatory system is the closed system with veins, arteries and capillaries.
7)
Heart is always dorsal in position.
Heart is always ventral and anterior.
8)
Respiratory pigment haemoglobin, if present, dissolved in plasma.
Haemoglobin is included in red blood corpuscles.
9)
Blood flowing through arteries may pass freely into body cavity.
Blood circulates through the closed system of vessels-arteries, capillaries and veins.
10)
True tail is not found. Anus is terminal and opens at posterior end of body.
The true tail that may be stated as post anal continuation of body axis may be present.
11)
Skin comprises of only one layer.
Skin comprise of 2 distinct layers, the outer epidermis overlying thick dermis.
12)
Eyes develop from skin and not from brain. Compound eyes are frequently present.
Eyes grow as outgrowths of brain compound eyes are never found.
13)
Alimentary canal present or absent
Alimentary canal all the time present.
14)
No gill slits.
Gill Slits are there at least in embryos.
15)
Reproduction sexual or asexual.
Phylum Protozoa:
The term Protozoa refers to Unicellular or acellular animals of microscopic size. They form simplest of all groups in animals' kingdom. Name protozoa means "first animals" and derived from 2 Greek words, PROTOS, means first and zoon, meaning animal. They are looked on as most primitive form of life, appearing first in evolutionary history. Structurally the protozoan is one-called animal similar with one cell or METAZOAN but functionally it is the complete organisms, physiologically balanced and executes all necessary process of the animal, therefore protozoans are known as acellular or non-cellular organisms.
Distinctive Features of Phylum Protozoa:
Categorization of Protozoan:
The categorization of Phylum Protozoa is based on locomotory Structure. Phylum Protozoa is separated into sub-phylia;
Amoeba Phylum - Protozoa:
Morphological:
Structure of Amoeba:
Amoeba, the member of class Sarcodine is common example of simplest animal life and is generally universally studied as:
The most common species is Amoeba proteus. It estimates approx 0.25 to 0.60mm in size and is hard to see without the assistance of the microscope. Under microscope, it emerges as the minute slate - colored shining, irregular mass of the gelatin-like substance with study moving fine particles. It has irregular shape due to fact that protrusions of its own substance and created at its surface in various directions -Pseudopodia and they are continually changing in shape in achieve animal by protoplasm. It comprises of very- thing elastic external plasma membrane or plasmallema
Habitat:
Common Amoeba Proteus may be gathered from the variety of places where condition of water, temperature and organic food are favorable like debris from watering troughs, pools, drains, bottom of ponds, ditches, abandoned tanning pits and wherever there is plentiful aquatic vegetation.
Locomotion:
Pseudopodia are related with ingestion of food and Locomotion. In Locomotion, it form one or more blunt finger-shaped procedure or pseudopodia that carry on to grow more and more by flow of protoplasm that is clearly withdrawn from somewhere else and, thus, if formation of Pseudopodium is mostly in one direction, amoeba shold change in position and it is in this manner that locomotion is affected.
Irritability:
This has particular reference to pseudopodia. If pseudopodium, extension, must come in contact with foreign body, like the grain of sand, it is retracted and new one is pushed out in changed direction. This signifies that made Protoplasm of amoeba has power to perceived nervous messages or stimuli over whole of its surface, as at whatever point pseudopodium is extended it will respond to this reaction.
Food and Feeding:
Aquatic environment of amoeba has small particles of different organic substances, appropriate for food. This comprises unicelluar plants, specific bacteria and diatoms, small filaments of algae, different protozoan species together with organic debris of several kinds. It is holozoic in nutrition, i.e., it ingests solid organic particle. This is with aid of pseudopodia.
Egestion:
There is no specialized organelle in amoeba for throwing out indigestible material. It leaves animal through temporary opening in ectoplasm at rear of animal. Plasmallema ruptures at point of contact with vacuole and feaces are egested or animal flows away. New plasmalemma is created at ruptured area to stop outflow of endoplasm.
Respiration:
Process whereby Carbondioxide leaving protoplasm is exchange for oxygen entering it, is called as Respiration. In amoeba this exchange is carried on essentially through general surface of body. Water in which amoeba lives should comprise dissolved oxygen in order that this diffusion may go on.
Osmo Regulation:
Osmo regulation refers to regulation of water content. Contractile vacuole is liable for the function. Contractile vacuole is clear space. It has the fluid less dense than surrounding protoplasm. At more or less regular intervals, it abruptly collapses, its walls having contracted, force out fluid contents that is known to have traces of urea and Carbon dioxide but generally water.
Reproduction:
Reproduction is asexual and is by methods of:
Tutorsglobe: A way to secure high grade in your curriculum (Online Tutoring)
Expand your confidence, grow study skills and improve your grades.
Since 2009, Tutorsglobe has proactively helped millions of students to get better grades in school, college or university and score well in competitive tests with live, one-on-one online tutoring.
Using an advanced developed tutoring system providing little or no wait time, the students are connected on-demand with a tutor at www.tutorsglobe.com. Students work one-on-one, in real-time with a tutor, communicating and studying using a virtual whiteboard technology. Scientific and mathematical notation, symbols, geometric figures, graphing and freehand drawing can be rendered quickly and easily in the advanced whiteboard.
Free to know our price and packages for online biology tutoring. Chat with us or submit request at [email protected]
Free SAT Study Guide, SAT Test Papers, SAT Practice papers, SAT Test pattern and general information, Find SAT exam information and resource, material free at Tutorsglobe.com
tutorsglobe.com propagation by leaves assignment help-homework help by online natural methods of vegetative propagation tutors
introduction to photochemistry tutorial all along with the key concepts of light-matter, absorption of light by atoms and molecules, photochemistry, basic laws of photochemistry, reaction pathways, applications of photochemistry, photochemistry induced by visible-ultraviolet light
Zoogeography-Neartic and Neotropical Regions tutorial all along with the key concepts of Fauna of the Nearctic Region, Neotropical Region-bird continent, Composition in the Nearctic region
Common Emitter-Common Base-Common Collector Amplifiers tutorial all along with the key concepts of low frequencies small-signal characteristics, input impedance, voltage gain, emitter degeneration, grounded-base amplifier, Ultra High Frequency range
tutorsglobe.com bacteria-structure assignment help-homework help by online microbiology tutors
TutorsGlobe.com Alkanoates Assignment Help-Homework Help by Online Access Chemistry Tutors
the working of hair dryer is very much simple and most of its mechanisms revolve around its fan. while the dryer is switched on, the electricity travels to the windings of the motor of the fan.
theory of demand and demand curve and factor affecting demand curve, managerial economics homework help - comprising the key concepts of individual demand curve, complement, total benefit, marginal benefit, substitute, buyer surplus, normal product, market demand curve, two-part tariff, inferior product and horizontal summation
Directors’ share option schemes have been a popular method of rewarding the directors of large listed companies and several arguments have been put forward to support their use.
Cell Structure in Algae tutorial all along with the key concepts of Prokaryotic Algal Cell, Specialized Cells of Cyanobacteria, Heterocysts, Akinetes, Eukaryotic Algal Cell and Organelles of the Eukaryotic cells
Theory and lecture notes of Interest Rate all along with the key concepts of the interest rate, Six Key Indicators of Macroeconomics and Real interest rates. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Interest Rate.
Having set out the major principles included in preparing an income statement, we required to consider some additional points.
tutorsglobe.com three phase single layer winding assignment help-homework help by online development of winding ac machine tutors
IAS 8 sets out the criterion for selecting and changing accounting policies and the suitable treatment for disclosing these policies. It also sets out the treatment for disclosing alterations in accounting estimates and for the rectification of errors.
1936877
Questions Asked
3689
Tutors
1446351
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!