The Spleen and Thymus Are Part of the

question 80

Multiple Choice

The spleen and thymus are part of the

• A)cardiovascular system.
• B)respiratory system.
• C)digestive system.
• D)lymphatic and immune systems.

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Definitions:

Bacteria

Microscopic, single-celled organisms found in virtually all environments, both harmful and beneficial to humans.

Lord Kelvin

A title for William Thomson, a prominent 19th-century physicist known for his work in thermodynamics and for developing the Kelvin scale of temperature.

Million Years Old

A term used to describe the age of geological formations, fossils, or the time since evolutionary events, measured in millions of years.

Thousand Years Old

Describes an object, organism, or structure that has existed for approximately one millennium.