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Frogs (Rana sp., Ranidae) and toads (Bufo sp., Bufonidae)
Tailess, except during one stage in their development
Two types of respiration: cutaneous respiration and bucco-pharyngeal respiration
Internal organs arranged the same way as those of the human body.
OBJECTIVES: Identify various organ-system of the
frog Know the various organ parts of each
system Correlate structure-organ with function
Flattened head
Elongated, slightly cylindrical body
No neck or tail
Snout Mouth Nostrils or external nares
Eyes Upper and lower eyelids Nictitating membrane Brow spot
Tympanic membrane or ear drum
Anus Sacral hump Anterior limbs (forelimbs)
Upper arm Forearm Wrist Hand with digits
Posterior limbs (hindlimbs) Thigh Shank Ankle Foot with digits + web
Bones and cartiliges
Functions Framework of the body Supports and protects organs Attachments of muscles
Protects and encloses the brain
Protects sense organs (eyes, ears, nares, tongue)
Flat bone with upper jaw fused with it
V-shaped bone
Right and left half are of the same parts
Articulates with the skull at its posterior ends
Cartiliginous basilingual plate lying on the floor of the mouth cavity
Supports the tongue
Backbone
Series of bones or vertebra from the base of the skull and the whole back
Series of bones in the breast and shoulder region
Firm support for the forelimb
Series of bones in the midventral portion of chest
Breast bone
Responsible for the ability to locomote
Movable articulating bones
Attached to the pectoral girdle
Fusion of 6 bones
Articulates with the transverse process of sacral vertebra at one end and with femur at opposite end
Also for locomotion
Composed of movable articulating bones
Attached to the pelvic girdle