The digestive tract is essentially one long tube. the order of the structures, beginning with the mouth, is:

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.