You dissect a specimen of a vertebrate during an anatomy laboratory.It has the following characteristics: lungs,abundant blood capillaries under thin skin,a partially-divided heart,a pulmonary circuit,and four walking legs.What is this animal?

Question

Quizplus · Accepted Answer

The presence of lungs and abundant blood capillaries under thin skin indicate that this animal relies heavily on respiration through its skin, as is the case with amphibians. The partially-divided heart indicates that it is also an amphibian, as reptiles have a completely divided heart, and placental and marsupial mammals have a four-chambered heart. The presence of four walking legs further supports the classification of this animal as an amphibian.

You Dissect a Specimen of a Vertebrate During an Anatomy