Question

Insects do not have windpipes or lungs. Instead, they have small holes on the outside of their bodies connecting to tubes on the inside. Fish do not have windpipes or lungs, either. Instead, they have organs called gills. There are many blood vessels near the surface of the gill tissue. Some salamanders do not have lungs or gills. Instead, they have many blood vessels near the surface of their thin, moist skin. According to the information in this passage, which statement is true?

A.
Insects do not have blood vessels, so they do not need to take in oxygen.

B.
Salamanders get the oxygen they need from the food they eat.

C.
Animals without lungs do not need oxygen in order to survive.

D.
Animals have developed different ways to get oxygen into their bodies.

Answer 1

D. Animals have developed different ways to get oxygen into their bodies.