Approximately How Many Alveoli Are There in a 10-Year-Old's Lung

question 88

Multiple Choice

Approximately how many alveoli are there in a 10-year-old's lung?

• A)50 million
• B)200 million
• C)350 million
• D)500 million

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Definitions:

Sarcomere

The functional unit of muscle fibers, responsible for the muscle's contraction and relaxation mechanisms.

Z And M Lines

Components of the sarcomere in muscle fibers; the Z line marks the boundary between sarcomeres, and the M line runs down the center.

A Bands And I Bands

Regions found within skeletal muscle fibers, where A bands are dark areas containing thick filaments while I bands are light areas containing thin filaments.

Naming Muscles

The convention in anatomy for describing and identifying muscles based on factors like their location, shape, size, direction of fibers, number of origins, and function.