power point for GCE OL students

1. Vertebrates

2. ertebrates
V Animals with
backbones

3. Fish [class- Pisces]
Live in water
They possess ,
»A streamlined body
»Fins for locomotion
»Gills for exchange of gases
Skin covered with scales.
They have two chambered heart
They have variable Body temperature
(Poikilothermic)

4. Cartilagous Fish
They have ,
A skeleton of cartilage
Separate gills which are not covered
» Shark
Bony Fish
They have ,
A skeleton with bones
Gills covered with a bony plate
» Trout

5. Amphibians
Have smooth moist skin
Lungs and moist skin act as respiratory organs
Three chambered heart
Amphibians live the first part of their lives in
water and the second part on land
Poikilothermic
» frogs and toads,
» salamanders

6. Reptiles
The animals first adapt to live on land
They have
Rough dry skin (The skin is covered with hard dry
scales )
Three chambered heart
Breathe via lungs
Most of the Reptile have four legs some of
them have no legs they are called snakes.
Poikilothermic

7. Birds
The body is covered with feathers
Front limbs are adapted as wings
Posses a beak
Have a four chambered heart
Have constant body temperature
(homoiothermic)

8. Mammals
Mammals posses ,
Hair coat covering their body
Two external ears
Four chambered heart
Mammary glands to produce milk
Breathe via lungs
During their life cycle mammals may form two
sets of teeth.
Have constant body temperature
(homoiothermic)