Reptiles' skin is dry in nature. They are cold-blooded forms.

1. ALPINE SKI HOUSE
GENERAL CHARACTERS OF
REPTILES
Dr. BGR

2. AGENDA
• Introduction
• Key Characteristics
• General Characteristics
• Example
• Summary

3. SCIENTIFIC CLASSIFICATION
• Kingdom: Animalia
Note
All animals are members of the Animalia
• PHYLUM: CHORDATA
Chordate: animal of the phylum Chordata

4. HABITAT
• terrestrial animals
Habitat: Natural environment of an animal
Note

5. ECTOTHERMIC ANIMALS
• Ectotherm: any so-called cold-blooded animal
animals
Cold Blooded
Cannot maintain
Constant
temperature
Warm-Blooded
Can maintain
Constant
temperature

6. SKIN
 dry
 rough
 without any glands
Note
Skin: made by keratin
Keratin: Type of protein

7. BODY
divided into head, neck, trunk, & tail

8. RESPIRATION
• respiration takes place with the help of the lungs

9. LIMBS
• Limbs may / may not be present.
• If they have limbs, they are 2 pairs of pentadactyl limbs, each bearing claws
• Snakes do not have limbs

10. CIRCULATORY SYSTEM / CARDIOVASCULAR SYSTEM
• heart is 3 chambered
• Crocodiles have a 4-chambered heart
Note
 blood contains RBC.
 Nucleated RBC

11. CENTRAL NERVOUS SYSTEM (CNS)
comprises 12 pairs of cranial nerves

12. EAR
• Reptiles do not have external ear openings

13. KIDNEY
• Reptiles are generally uricotelic.
• They mostly excrete nitrogenous wastes as uric acid
kidney
Pronephric
Kidney
Mesonephric
Kidney
Metanephric
Kidney

14. FERTILISATION
internal
Fertilization
Internal external

15. OVIPARITY
• They are oviparous
• the eggs are very yolky
Note
no other embryonic development within the mother.

16. DEVELOPMENT
direct
Development
Direct Indirect

17. CLOACA
present
Note
 common chamber
 outlet into which the intestinal, urinary, & genital tracts open.

18. EXAMPLE
• Snakes
• Turtles
• Lizards
• Crocodiles

19. thank you
drbgrpublications@gmail.com
https://drbgrpublications.in/