Solid Lines Are Used to Show

question 21

Multiple Choice

Solid lines are used to show

• A)reference locations for the machinist who will be making the part.
• B)the visible edges of planes or the intersection of two planes.
• C)optional start/stop locations.
• D)reference locations for assembly.

---

Definitions:

Alveolar Air

The air present within the alveoli, the tiny air sacs in the lungs where gas exchange with blood occurs.

Atmospheric Air

The mixture of gases surrounding the earth, primarily composed of nitrogen, oxygen, argon, carbon dioxide, and trace gases.

Water Vapor

The gaseous phase of water, forming clouds and contributing to the greenhouse effect.

Pulmonary Capillaries

Tiny blood vessels in the lungs where gas exchange occurs, allowing for the uptake of oxygen and the release of carbon dioxide.