The Circulatory System in the Earthworm

question 18

Multiple Choice

The circulatory system in the earthworm

• A) Is absent since all respiration is across the epidermis
• B) Is an open system where hemolymph washes through body sinuses
• C) Has a dorsal vessel as the main pumping organ
• D) Has no pumping structure but depends on the action of body muscles to move the blood
• E) Has five pumps that circulate blood first to the gills and then to the rest of the body

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Definitions:

Residual Value

The anticipated monetary value of an asset at the end of its operational life.

Units-Of-Production Depreciation

A depreciation method that allocates the cost of an asset over its useful life based on units produced rather than time, reflecting actual wear and tear.

Accumulated Depreciation

The total amount of depreciation expense allocated to a fixed asset since it was in service, reducing its book value on the balance sheet.

Service Life

The estimated duration of time that an asset is expected to be usable for its intended purpose.