External Anatomy of Toads

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Biology

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38 Terms

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Amphibians known for their jumping ability and semi-aquatic lifestyle.

Frogs

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Amphibians with dry, warty skin and shorter hind legs, similar to frogs.

Toads

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The order of amphibians encompassing frogs and toads.

Anura

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Carefully cutting open and examining internal structures of organisms for study.

Dissection

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Study of the microscopic anatomy of tissues.

Histology

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Outer skin layer acting as a protective barrier.

Epidermis

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Inner skin layer containing blood vessels and nerves.

Dermis

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Arranged in layers or strata.

Stratified

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Shedding or molting the outer skin layer.

Ecdysis

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Cells responsible for animal coloration.

Melanophores

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Skin cells changing color.

Chromatophores

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Tissue supporting and connecting organs in the body.

Connective Tissue

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Microscope with multiple lenses for magnification.

Compound Light Microscope

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Container for dissecting small organisms.

Dissecting Pan

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Tool for delicate tissue exploration.

Probe

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Divides the body into front and back portions.

Frontal Plane

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Divides the body into right and left halves.

Sagittal Plane

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Divides the body into upper and lower portions.

Transverse Plane

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Body parts arranged in mirror-image halves.

Bilateral Symmetry

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Upper side or back of an organism.

Dorsal

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Lower side or belly of an organism.

Ventral

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Front or head end of an organism.

Anterior

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Tail or hind end of an organism.

Posterior

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Closer to the point of attachment.

Proximal

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Farther from the point of attachment.

Distal

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Central body part including head and trunk.

Axial Region

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Body part including limbs or appendages.

Appendicular Region

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Opening at the posterior end of digestive, reproductive, and urinary tracts in amphibians.

Cloacal Aperture

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Transparent third eyelid in some animals.

Nictitating Membrane

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Gland behind the eyes in toads secreting toxins.

Paratoid Gland

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Rudimentary toe on the inner side of the foot in some amphibians.

Prehallux

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Mating position in frogs and toads for fertilization.

Amplexus

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Visible differences between male and female of the same species.

Sexually Dimorphic

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Front limbs or arms of an animal.

Forelimbs

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Rear limbs or legs of an animal.

Hindlimbs

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Toes connected by skin for swimming.

Webbed Toes

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Relating to the back and side surfaces of an organism.

Dorsolateral

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Cold-blooded vertebrates living on land but reproducing in water.

Amphibians