The Structure That Is Responsible for Returning Oxygenated Blood to the Heart

question 43

Multiple Choice

The structure that is responsible for returning oxygenated blood to the heart is the

• A) Pulmonary artery.
• B) Pulmonary vein.
• C) Superior vena cava.
• D) Inferior vena cava.

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Definitions:

Epidermis

The outermost layer of cells covering the body of an organism, providing protection against environmental factors.

Bundle Sheaths

Layers of tightly packed cells surrounding vascular bundles in plants, playing a key role in the process of photosynthesis in certain species.

Stipule Cells

Cells found at the base of the petiole in some plants, forming a structure known as a stipule, which may protect budding leaves or other functions.

Waxy Layers

Protective coatings found on the surfaces of plants and some insects, preventing water loss and providing defense against pests.