The body of frog is divided into two major regions:
Axial region
Appendicular region
Axial Region
Snout
Mouth
Nostrils or externalnares
Eyes
nictitatingmembrane
tympanicmembrane
browspot
poison or parotidgland
hump
anus
Appendicular Region
These are two pairs of appendages that arise from the trunk.
Forelimbs - the anterior pair of limbs which is shorter and smaller than the hindlimbs
Hindlimbs - the posterior pair of limbs which are long and bigger than the forelimbs.
Appendicular Region
Forelimbs -
the anterior pair of limbs which is shorter and smaller than the hindlimbs, this consists of:
upper arm- proximal arm
forearm - lower arm
manus or hand - distal part of the forelimb which subdivided into:
i. wrist
ii. palm
iii. digits or fingers - with 4 digits and the fifth is rudimentary. During the breeding season, the thumb is swollen in the male.
Appendicular Region
Hindlimbs -
the posterior pair of limbs which are long and bigger than the forelimbs. This is divided into 3 parts:
thigh- proximal part
shank- lower part
pes or foot -distal part, this is subdivided into:
i. tarsus or ankle
ii. sole
iii. digits or toes- there are five toes per foot and these are connected together by a membranous skin the web.
Prehallux- is a rudiment for the sixth toe.
BUCCAL CAVITY OF FROG
Maxillary teeth
Upper lip
Sulcus marginalis
Median subrostral fossa
Pulvinar rostrale
Lateral subrostral fossa
Vomerine teeth
Choanae or internal nares
Eyeballs Prominences
Opening of the Eustacian tube
Tongue
Tuberculum prelinguale
Prelingual fossa
Laryngeal prominence
Glottis
Opening of the vocal sac
Opening of the esophagus
Maxillaryteeth - a row of small, conical teeth on the margin of the upper jaw.
Upperlip - fleshly fold closely adhering to the upper jaw.
Sulcus marginalis - groove at the inner side of the row of maxillary teeth which receives the lower jaw when it is closed.
Median subrostral fossa - tiny shallow depressions of the sulcus marginalis at the tip of the upper jaw.
Pulvinar rostrale - low elevations on each side of the median subrostral fossa.
Lateral subrostral fossa - two other depressions of the sulcus marginalis lateral to the pulvinars.
Vomerine teeth - two small groups of fine teeth between the internal nares projecting from the vomer bones.
Choanae or internal nares- two oval opening on the antero-lateral side of the vomerine teeth.
Eyeballs prominences - two big bulges along the posterior half of the roof of the mouth
Opening of theEustachiantube -two openings, one near each angle of the jaws leading outward to the tympanum
Tongue - large, bilobed structure occupying a great part of the floor of the buccal cavity and attached to the anterior tip of the lower jaw.
Tuberculum prelinguale - an elevation at the tip of the lower jaw which fits into the median subrostral fossa when the mouth is closed.
Prelingual fossa - two shallow depressions one on each side of the tuberculum prelinguale.
Laryngeal prominence - a hardened oval-shaped structure behind the tongue with a slit opening at the center.
Glottis - a narrow, longitudinal slit at the middle of the laryngeal prominence. This is the opening of the larynx or voice box into the mouth cavity.
Opening of thevocal sac- found in male only. Two openings at the posterior part of the mouth cavity, close to the angle of the jaws, opposite the openings of the Eustachian tube.
Opening of the esophagus - an opening behind the laryngeal prominence.
Appendicular region - composed of the hindlimbs and the forelimbs
Axial region - composed of the head and the trunk.
Snout - the protruding region at the anterior region of the head
Mouth - large anterior opening of the head with teeth and a tongue
Nostrils or external nares - these are two small opening at the postero-dorsal side of the snout.
Eyes - two, on the dorso-lateral sides of the head that has upper and lower eyelids.
Nictitating membrane - third eyelid, a thin and transparent membrane located above the lower eyelid.
Tympanic membrane - tympanum or eardrum, a small round area of thickened membrane posterior to the eye.
Brow spot - lightly-colored part at the median dorsal line of the head posterior to the eye. This may be concealed in darkly pigmented specimen.
Poison or Parotid gland - two large swellings posterior to the tympanic membrane.
Hump - a conspicuous elevation on the mid-dorsal surface of the trunk near the posterior end.
Anus - a single small opening at the posterior end of the trunk which serves for the exit of reproductive and excretory products.