explain the class mammalia ?
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ANSWERS :-
⚡CLASS :- MAMMALIA
✴It is most evolved group of animal.
✴ Having external pinna hairs on skin , mammary gland in female mammals.
✴skin has cutaneous gland
✴Body cavity divided into two chambered by the presence of muscular diaphragm.
✴it has 4 chambered heart
✴dicondylic skull
✴close type circulation.
✴sexual mode of reproduction
✨oviperous - egg laying
✨ viviparous -birth of young ones
✨ovoviperous - birth of immature child
❄ classification of class mammalia ❄
✨it is divided into 2 sub -classes
✴prototheria
✴Theria
✨ prototheria :- egg laying mammals, external pinna is absent , corpus callosum is absent, mammary gland without nipple, presence of abdominal testes.
for example :-
✴plytipus – only poisonous mammal.
✴echidna – connecting link between reptiles and mammals.
-----------------------------------
✨Theria :- pinna present, well developed mammary gland with elevated,cloaca absent ( part of large intestine which involved in the digestive, excretory and reproductive system).
⚡it is divided into two infra classes :-
1) infra classes
metatheria – ovoviperous
for example
✴ macropus (kangaroo)
2) infra classes
eutheria –viviperous
✴all mammal which birth child .
✨primate :- Any various animal which have highly developed brain ,eye ,etc.
for example :-
monkey , human ,apes etc.
✨non primate :- any various animal which have small brain.
for example :-
pigs , crow ----etc.
_________________________
❤BE BRAINY ❤
---------------------------
⚡CLASS :- MAMMALIA
✴It is most evolved group of animal.
✴ Having external pinna hairs on skin , mammary gland in female mammals.
✴skin has cutaneous gland
✴Body cavity divided into two chambered by the presence of muscular diaphragm.
✴it has 4 chambered heart
✴dicondylic skull
✴close type circulation.
✴sexual mode of reproduction
✨oviperous - egg laying
✨ viviparous -birth of young ones
✨ovoviperous - birth of immature child
❄ classification of class mammalia ❄
✨it is divided into 2 sub -classes
✴prototheria
✴Theria
✨ prototheria :- egg laying mammals, external pinna is absent , corpus callosum is absent, mammary gland without nipple, presence of abdominal testes.
for example :-
✴plytipus – only poisonous mammal.
✴echidna – connecting link between reptiles and mammals.
-----------------------------------
✨Theria :- pinna present, well developed mammary gland with elevated,cloaca absent ( part of large intestine which involved in the digestive, excretory and reproductive system).
⚡it is divided into two infra classes :-
1) infra classes
metatheria – ovoviperous
for example
✴ macropus (kangaroo)
2) infra classes
eutheria –viviperous
✴all mammal which birth child .
✨primate :- Any various animal which have highly developed brain ,eye ,etc.
for example :-
monkey , human ,apes etc.
✨non primate :- any various animal which have small brain.
for example :-
pigs , crow ----etc.
_________________________
❤BE BRAINY ❤
---------------------------
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┗─━─━─━─━∞◆∞━─━─━─━─┛
Vertebrate➫ The chordates that possess a backbone are called vertebrates.
► It is also a Subphylum Vertebrate.
➧ Characteristics are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❱ Body is bilaterally symmetrical.
❱ Body wall is triploblastic.
❱ Complex differentiation of body tissues & organs
❱ Notochord is present in the Embryo.
❱ nerve cord is divided into brain & spinal cord.
❱ Brain is enclosed in a brain box.
❱ Body is divided into head Thorax & abdomen.
❱ Body has two pairs of fins or names.
❱ Gills either present throughout life or by lungs.
➧ Subphylum Vertebrate divided into Five Classes:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❶❭ Class Pisces:-
━━━━━━━━━━━━━━━━━━☟
❱ These are cold blooded.
❱ These are exclusively aquatic invertebrates.
❱ Body is streamlined.
❱ They have one pair of pectoral & pelvic fins.
❱ Respiration by 5 pairs of gills.
❱ Heart is two chambered.
❱ Skin is slimmy & covered with scales.
►Examples:- Electric Rays & DogFish
➧ Types 0f Class Pisces are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
➀❭ Cartilaginous Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is ventral.
◉ It is totally marine.
◉ Tail is heterocercal.
◉ Endoskeleton is Cartilaginous.
②❭ Bony Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is trrminal.
◉ It is freshwater.
◉ Tail is homocercal.
◉ Endoskeleton is Bony.
❷❭ Class Amphibia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, trunk & Tail.
❱ Heart is three - Chambers.
❱ Fertilization is external & lay eggs.
❱ Respiration through gills, lungs & skin.
❱ They undergo hibernation & aestivation.
❱ Embryonic membrane is absent.
❱ Skin is a smooth & moist.
►Examples:- Seahorse & Catla
❸❭ Class Reptilia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, neck, trunk and tail.
❱ Heart is incompletely four chambered.
❱ Fertilization is internal.
❱ Respiration through gills.
❱ It is the first Terrestrial vertebrates.
❱ Embryonic membrane is present.
❱ Skin is rough & dry.
►Examples:- Frogs & Toads
❹❭ Class Aves:-
━━━━━━━━━━━━━━━━━━☟
❱ These are warm blooded.
❱ Feathers are present on the body.
❱ Respiration by lungs with air sacs.
❱ Mammary gland is absent.
❱ They are 0viparous. Beek present.
❱ Bones are flight.
❱ Sweat & oil gland is absent.
❱ External ear is absent.
►Examples:- Crows & Parrots
❺❭ Class Mammalia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are also warm blooded.
❱ Body covered with hair.
❱ Respiration by lungs without air sacs.
❱ Mammary gland is present.
❱ Teeth are present.
❱ Sweet and all gland is present.
❱ Solid bones are present.
❱ Heart is four chamber.
❱ External ears are present.
►Examples:- Humans & Rabbits
_________
Thanks...✊
✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭
┗─━─━─━─━∞◆∞━─━─━─━─┛
Vertebrate➫ The chordates that possess a backbone are called vertebrates.
► It is also a Subphylum Vertebrate.
➧ Characteristics are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❱ Body is bilaterally symmetrical.
❱ Body wall is triploblastic.
❱ Complex differentiation of body tissues & organs
❱ Notochord is present in the Embryo.
❱ nerve cord is divided into brain & spinal cord.
❱ Brain is enclosed in a brain box.
❱ Body is divided into head Thorax & abdomen.
❱ Body has two pairs of fins or names.
❱ Gills either present throughout life or by lungs.
➧ Subphylum Vertebrate divided into Five Classes:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❶❭ Class Pisces:-
━━━━━━━━━━━━━━━━━━☟
❱ These are cold blooded.
❱ These are exclusively aquatic invertebrates.
❱ Body is streamlined.
❱ They have one pair of pectoral & pelvic fins.
❱ Respiration by 5 pairs of gills.
❱ Heart is two chambered.
❱ Skin is slimmy & covered with scales.
►Examples:- Electric Rays & DogFish
➧ Types 0f Class Pisces are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
➀❭ Cartilaginous Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is ventral.
◉ It is totally marine.
◉ Tail is heterocercal.
◉ Endoskeleton is Cartilaginous.
②❭ Bony Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is trrminal.
◉ It is freshwater.
◉ Tail is homocercal.
◉ Endoskeleton is Bony.
❷❭ Class Amphibia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, trunk & Tail.
❱ Heart is three - Chambers.
❱ Fertilization is external & lay eggs.
❱ Respiration through gills, lungs & skin.
❱ They undergo hibernation & aestivation.
❱ Embryonic membrane is absent.
❱ Skin is a smooth & moist.
►Examples:- Seahorse & Catla
❸❭ Class Reptilia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, neck, trunk and tail.
❱ Heart is incompletely four chambered.
❱ Fertilization is internal.
❱ Respiration through gills.
❱ It is the first Terrestrial vertebrates.
❱ Embryonic membrane is present.
❱ Skin is rough & dry.
►Examples:- Frogs & Toads
❹❭ Class Aves:-
━━━━━━━━━━━━━━━━━━☟
❱ These are warm blooded.
❱ Feathers are present on the body.
❱ Respiration by lungs with air sacs.
❱ Mammary gland is absent.
❱ They are 0viparous. Beek present.
❱ Bones are flight.
❱ Sweat & oil gland is absent.
❱ External ear is absent.
►Examples:- Crows & Parrots
❺❭ Class Mammalia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are also warm blooded.
❱ Body covered with hair.
❱ Respiration by lungs without air sacs.
❱ Mammary gland is present.
❱ Teeth are present.
❱ Sweet and all gland is present.
❱ Solid bones are present.
❱ Heart is four chamber.
❱ External ears are present.
►Examples:- Humans & Rabbits
_________
Thanks...✊
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