Which tissue forms the walls of internal organs?

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Study for the ELANCO Advanced Animal Science Exam. Enhance your knowledge with flashcards and multiple choice questions, with hints and explanations for each question. Get ready for your exam!

Multiple Choice

Which tissue forms the walls of internal organs?

Explanation:
Smooth muscle tissue forms the walls of hollow internal organs. It’s involuntary and non‑striated, with spindle-shaped cells that contract to move contents through organs (peristalsis) and to constrict or dilate lumen size. This tissue lines structures such as the stomach, intestines, bladder, uterus, and blood vessels, providing the muscular layer that governs flow and pressure inside these organs. Cardiac muscle makes up heart walls, skeletal muscle handles voluntary movement and attachment to bones, and nervous tissue transmits signals; none of these primarily form the walls of hollow organs like smooth muscle does.

Smooth muscle tissue forms the walls of hollow internal organs. It’s involuntary and non‑striated, with spindle-shaped cells that contract to move contents through organs (peristalsis) and to constrict or dilate lumen size. This tissue lines structures such as the stomach, intestines, bladder, uterus, and blood vessels, providing the muscular layer that governs flow and pressure inside these organs. Cardiac muscle makes up heart walls, skeletal muscle handles voluntary movement and attachment to bones, and nervous tissue transmits signals; none of these primarily form the walls of hollow organs like smooth muscle does.

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