Spiral Arms Are

question 87

Multiple Choice

Spiral arms are

• A) solid features.
• B) clumps of gas and dust that travel together.
• C) tracks that stars follow to leave the galaxy.
• D) density fluctuations in a galaxy's disk.
• E) bipolar outflows from the galactic nucleus.

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Definitions:

Esophagus

The muscular tube that connects the throat (pharynx) with the stomach, responsible for moving swallowed food and liquids.

Large Intestine

The final section of the gastrointestinal tract, responsible for water absorption and the formation of feces.

Mucosal Layer

The damp internal surface of certain organs and bodily cavities, including the stomach, lungs, nose, and mouth.

Small Intestine

A part of the digestive system where the majority of digestion and absorption of nutrients occurs; it is made up of the duodenum, jejunum, and ileum.