Download - Hello,I am Francis. I will introduce the morphology of Molluscs Echinoderms and Chordates to you !!
Adaptive featuresOrganisation Radial symmetry, triploblastic, unseg
mented
Gaseous exchange Gill (papulae) between spines
Nutrition Mouth stomach digest externally
Support Water vascular system, madreporite
Fertilization External fertilization
Embryo develop External
Movement Tube feet link to w.v.s.
Special features Tentacle and eyespot, pedicellariae
Adaptive features
Gaseous exchange Mantle or gill
Nutrition Filter feeding or mouth or radula or sucker on tentacle
Support Shell or water
Fertilization Internal or external
Embryo develop external
Movement Adductor muscle or tentacle
Special features Cuttlefish with modern eye
Adaptive features
Gaseous exchange Gill
Nutrition Mouth with teeth
Support Cartilage or bone
Fertilization External
Embryo develop External
Movement Fins
Special features Lateral line, wet mucus scales
Function:
Serves as a “distance touch”in water for
detecting and locating objects and moving
animals
Skeleton of amphibians
• both bony and cartilaginous components in different ratio
(depends on strength required for locomotion)
Adaptive features
Gaseous exchange Skin lung gill and buccal cavity
Nutrition Mouth
Support Bone
Fertilization External
Embryo develop External
Movement Tail or leg
Special features Metamorphoses, 3 chambers heart,
Naked wet skin
• have a largely cartilaginous skeleton
• more rigid and bony to withstand the impact of jumping and landing
Characteristics of reptile
• most lack external ears • breathe with lungs• Dry and tough skin• have backbones or spinal columns.
Except for snakes• covered with scales
Skeletal FeaturesAll reptiles have backbones or spinal columns. Except for snakes, reptiles have paired limbs that typically end in five-clawed fingers or toes. Most reptiles have a pelvis that is associated with at least two spinal bones.
Adaptive features
Gaseous exchange Lung
Nutrition Mouth
Support Bone
Fertilization Internal
Embryo develop External - lay egg
Movement Tail, leg
Special features Dry scale, 3,4 chambers heart
• sight is important for hunting
• Some organisms like bat,eyes have been lost or have become greatly
reduced
• Amphibians are very susceptible to temperature and pressure change
Adaptive features
Gaseous exchange Lung and air sac
Nutrition Beak
Support Hollow bone
Fertilization internal
Embryo develop Egg external
Movement Wing with feather to fly, walk
Special features Wing, beak, feather, scale on leg
Adaptive features
Gaseous exchange lung
Nutrition Mouth with incisor, canine, molar
Support bone
Fertilization internal
Embryo develop internal
Movement Wing in bat, legs
Special features Fur, hair, parental care