Habit and habitat: Aquatic, fresh water or marine, cold blooded vertebrates. Skin: Covered with scales, bony plates or dermal denticies. Fins: Paired or unpaired with soft or spiny rays. Endoskeleton: Cartilaginous and bony.
Respiratory organs: Gills, but accessory respiratory organs are also present. The gill slits open outside. These are covered in bony fishes. These gill slits are never more than seven. Lateral line system: Well developed.
Heart: Venous heart i. Two chambered-one auricle and one ventricle. Excretory system: Two mesonephric type kidneys. Cranial nerves: Ten pairs. Ear: Only internal. Sex: Unisexual. Development: Indirect. Reproductive organs: One pair of gonads with gonoducts. Classification - Class 1-Elasmobranchii e. Class 2-Holocephalii e. Class 3-Dipnoi e. Class 4 - Teleostomi e.
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ExpertsMind Services.The Superclass Pisces L. They have organs of respiration and locomotion related to a permanently aquatic life. The respiratory organs are the gills and the organs of locomotion are paired and impaired fins.Home ergometer
All are poikilothermous. Aquatic, either freshwater or marine, herbivorous or carnivorous, cold blooded, oviparous or ovoviviparous vertebrates. Body usually streamlined, spindle-shaped, some are elongated snake-like and a few are dorsoventrally compressed, and differentiated into head, trunk and tail.
Locomotion by paired pectoral and pelvic fins along with median dorsal and caudal fins, supported by true dermal fin-rays. Muscular tail used in propulsion.
Classification of Fishes: 8 Classes | Phylum Chordata
Exoskeleton of dermal scales, denticles or bony plates in Placodermi covering body surface. Placoid in Chondrichthyes and ganoid, cycloid or ctenoid in Osteichthyes. Endoskeleton is cartilaginous or bony. The notochord in usually replaced by vertebrae, either bone or cartilage. Presence of well-developed skull and a system of visceral arches, of which the first pair forms the upper and lower jaws, the latter movably articulated with the skull. Heart is venous and two chambered, i. Sinus venosus and renal and portal systems present.
Erythrocytes nucleated. Nostrils are paired but do not open into pharynx except Dipnoi. Nasal capsules are partly separate in Chondrichthyes and completely separate in Osteichthyes. Fertilisation internal or external. Females of Chondrichthyes are oviparous or ovoviviparous and of Osteichthyes are mostly oviparous and rarely ovoviviparous or viviparous.
Eggs with large amount of yolk. Cleavage meroblastic. About 40, species of fishes are known. Various workers have proposed different schemes of classification of fishes. However, no classification has been universally accepted because of confusion due to large number of fishes and great diversity in their shape, size, habits and habitat. Muller gave first classification of the lower vertebrates and divided Pisces into six subclasses:. He included cyclostomes in Marsipobranchii and cephalochordates in Leptocardii.
Agassiz separated lampreys and hagfishes into a separate class Myzontes and divided fishes into four classes. Boulenger classified the teleostean fishes into thirteen orders. Regan gave an elaborate classification of fishes in his several papers. Jordan divided fish-like vertebrates into six classes.Esecuzione di tutti i lavori e forniture, necessari per
Among the more recent authors GoodrichBergGrasse and Romer have given a detailed classification of fishes.They how internal ear with three semi-circular canals and provided with paired 4, apdages fins or limbs. Sexes are separate. The super class is divided into, two groups. Pisces Include three classes. Muller, Goodrich. Berg, Romer etc, classified the Pisces. There is no agreement among many authors with respect to the classification of fishes.
Class 1 Placodermi Aphstohyoids 1 It includes extinct fishes. Their exoskeleton Is in the form of bony plates or shields. It is not reduced.
Ex Climatius, Bothriolepis. Class 2.
General characteristic features of superclass Pisces (Fish)
Chondrlchthys or Elasmobranchi 1 These fishes are exclusively marine. They are not covered by operculum.
The Class Elasmobranchi is divided into two sub-classes. Sub-class Selachi :- In these fishes the pectoral fin has cartilagenous rods.
Fins are well developed. The caudal fin is hetetocercal.Drx rust remover uk
This subclass has four orders in which only two are living. Order 1. Proto selachl 1 Jaws show many pointed teeth. It is represented by few living species.
Ex :Heteroloatas Order 2. Euselachi 1 Skin contains placoid scales. They open separately. It is divided into two 1. Pleurotremata : 1 Gill slits on the lateral sides of the body. Sub-order Hypotermata: 1 It includes skates And Rays. Mouth is small and bounded by lips. Holostylic jaw suspension is seen.The Pisces is an extremely kind and compassionate soul that has a hell of a lot of love to give to the world. The Pisces is an extremely positive spirit to be around and they have a way of bringing out the bring best in the people that they are with.
They pick up on vibes and subtle clues that others often miss and they notice a hell of a lot more than many give them credit for. For the Pisces, reality is often just not where the party is at. They love to be made to feel specia l and wanted but they also know how to sweep their partner off their feet too. Pisces are deeply emotional individuals who feel everything intensely… both good and bad. Their moods can seem to change like the wind and they can go from feeling downright miserable one moment to on top of the world a minute later.
Pisces can often pick up on a persons true motives and intentions and more often than not their instincts turn out of be dead on. Sometimes Pisces just needs to get away from everything and everyone to take a breather from the chaos of life. They just need time to recharge their batteries and get their thoughts in order.
Few realize just how competitiv e the Pisces can be when they are presented with a challenge. They are incredibly supportive and comforting friends who always seem to know just what to say to make someone feel better.
Save my name, email, and website in this browser for the next time I comment. Facebook Twitter Pinterest. Click Here to Leave a Comment Below. Leave a Reply:. Sharing is Caring Help spread the word. You're awesome for doing it!Element: Water.
Quality: Mutable. Ruler: NeptuneJupiter. Greatest Overall Compatibility: VirgoTaurus. Date range: February 19 - March Weaknesses: Fearful, overly trusting, sad, desire to escape reality, can be a victim or a martyr.
Pisces likes: Being alone, sleeping, music, romance, visual media, swimming, spiritual themes. Pisces dislikes: Know-it-all, being criticized, the past coming back to haunt, cruelty of any kind. Pisces are very friendly, so they often find themselves in a company of very different people.
Pisces are selfless, they are always willing to help others, without hoping to get anything back. Pisces is a Water sign and as such this zodiac sign is characterized by empathy and expressed emotional capacity.
Their ruling planet is Neptune, so Pisces are more intuitive than others and have an artistic talent. Neptune is connected to music, so Pisces reveal music preferences in the earliest stages of life. They are generous, compassionate and extremely faithful and caring.
People born under the Pisces sign have an intuitive understanding of the life cycle and thus achieve the best emotional relationship with other beings. Pisces-born are known by their wisdom, but under the influence of Uranus, Pisces sometimes can take the role of a martyr, in order to catch the attention. Pisces are never judgmental and always forgiving. They are also known to be most tolerant of all the zodiac signs.
Although you can do a lot for your state of body and mind, relaxing and taking all necessary steps to release Continue to Pisces Daily Horoscope Continue to Pisces Tomorrow's Horoscope Find use to things around you, even if Continue to Pisces Weeky Horoscope Pisces Horoscope: This Month Apr Some things can be done online and in virtual space, but others simply need physical interaction and contact with another human being.
Continue to Pisces Monthly Horoscope Pisces Love and Sex Deep in their hearts, Pisces-born are incorrigible romantics.Cherokee county ga warrants list
They are very loyal, gentle and unconditionally generous to their partners. Pisces are passionate lovers who have a need to feel a real connection with their partners. Short-term relationships and adventures are not peculiar to this zodiac sign.
In love and relationship, they are blindly loyal and very caring. Gentle and caring, Pisces can be the best friends that may exist. In fact, they often put the needs of their friends in front of their needs. They are loyal, devoted, compassionate and whenever there is some problem in the family or among friends, they will do their best to resolve it. Deeply intuitive, Pisces can sense if something is wrong, even before it happens.
Pisces are expressive and they will not hesitate to express their feelings to the people around them. They expect others to be open to them as they are.Bmw r1200rt wiring diagram diagram base website wiring
Communication with loved ones is very important for them. Intuitive and often dreamy, Pisces feel best in a position where their creative skills will come to the fore, even better if it's for charity.Pisces are the most impressionable of the twelve zodiac signs.
Deeply empathetic, they often exhibit a gentle, patient nature, but one that is in want of inspiration. Pisces can be deeply affected by and completely absorbed into their environment. Pisces adapt well to their circumstances, both good and bad.
They are generous, amiable, positive natured people with a deep sense of kindness and compassion. Pisces are highly tuned in to everything around them including the feelings of others. Pisces are socially popular because of their easygoing and likable manner. They have an uncanny sense of perceiving what a person wants or needs, and delivering it. Pisces are reflexive, preferring to allow circumstances and events to unfold and, only then responding. Pisces are not typical people. They are too idealistic and impractical for every day run of the mill living.
Pisces are sensitive and instinctual rather than bookish or mechanical. When Pisces find the right situations, they are capable of some incredible deeds.
Pisces completely and wholly engage in a chosen path, to the exclusion of everything else. This obsessive compulsive energy can be healthy and not. Pisces can be workaholics and other kind of -aholics too. Pisces excel in situations where they can leverage their imaginative and intuitive nature.
They are exceptionally gifted artistically.Biology Animalia part 25 (Pisces: charactericsts, example, classification) CBSE class 11 XI
Pisces are often intensely interested and skilled at a wide variety of things and tend to learn by absorption as opposed to logic. Pisces are loyal, family oriented, kind and giving. They are receptive to new ideas and circumstances. Pisces have an uncanny ability to nurture and support which is directly related to their powerful intuition.
Pisces make profound artists of all types because they possess great, vivid imaginations. That powerful creativity is often expressed in music, literature, drama and art. Pisces love style, luxury and pleasure, and are always ready for new adventures. When Pisces travel, they enjoy unique, exotic, luxurious places as well as modest, indigenous settings where like to live as the locals do.
Main positive personality traits: Uncommon ability to instinctively respond to given situations; compassionate; understanding; artistic, sacrificing. Pisces are often scatterbrains. They don't do well in highly structured or regimented situations and generally buck convention.
Pisces can be so emotional, needy and intense that they can end up being a real drag to people around them. In business, Pisces can be unreliable, unmotivated, easily distracted, and have their heads in the clouds all the time. The not so nice side of Pisces manifests as being a gossip, indiscreet, and gullible.General characteristics of the sign Pisces. Pisces are directed strongly to the inner self. They are mystic and pensive but they also want to have contact with the outside. Generous to the core, they are able to make large sacrifices to a matter in which they believe.
People come to them complaining about their problems because Pisces understand others very well. Many Pisces are barkeepers, often good barkeepers, because they are helpful, love socializing and want to help people. They can be very good at listening to the problems of others, understand a lot, sympathise, and have a good instinct. They love eccentric things and sensationalism, are able to stir up sensation themselves. There movements are slow rather than fast. Fire signs can get annoyed at this.
Earthly they are not, can be lazy, but when they are in their element, then they can move mountains. Also they can be indecisive, walking with their head in the clouds and so fail to notice many things.
Pisces like to be alone, have a strong inner life, are able to withdraw within themselves, also in the company of others. They are sensitive, affectionate, altruistic, diligent, helpful, tolerant but also negligent, sentimental, depressed, fanatical, desperate and contradictory.
They can be very changeable, also negative, plaintive and vague. They suffer in silence, have problems shifting themselves. They think deeply about all kinds of profound often impractical problems, but they seldom solve them.
Their inner nature is good, gentle and sweet. They can love intensely in a gentle romantic manner. They are hesitate in their behaviour and often vague in speech. Their moods change quickly, they have typical and hard to understand qualities. Pisces can be musical geniuses, mediums, and spiritualists.
They have a mystic nature. Many are paranormally gifted or have a good intuition. They identify themselves with everything around them, take the colour of their surroundings, and let themselves be swept away, participate in everything, and speak the language or a dialect of others in no time at all.
They take over behavioural patterns, influences and feelings easily.
21 Secrets Of The Pisces Personality…
They are unfathomable and incomprehensible. Often they are misunderstood, so they must find happiness within themselves. Fish are creatures that make no sound.
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