The Major Secretory and Absorptive Structures of the Sea Star

question 52

Multiple Choice

The major secretory and absorptive structures of the sea star digestive system are the

• A)cardiac stomachs.
• B)rectal ceca.
• C)Polian vesicles.
• D)pyloric ceca.
• E)Tiedemann's bodies.

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Definitions:

Digestive Tract

A series of hollow organs joined in a long, twisting tube from the mouth to the anus where digestion and nutrient absorption occurs.

Bone

A hard, dense connective tissue that forms the structural elements of the skeleton in vertebrates.

Kidneys

Organs that filter waste products from the blood, regulate blood pressure, and maintain electrolyte balance, among other functions.

Hypothalamus

A region of the brain responsible for hormone production and regulation of vital bodily functions, including temperature, hunger, and thirst.