Question

select all that apply
choose all that are the functions of the fibrous skeleton.

□ anchors the cardiocytes and give them something to pull against
□ provides electrical insulation between the atria and ventricles
□ directly aids in the pumping mechanism of the heart
□ provides structural support for the heart
□ provides circulation for the heart

Explanation:

1. The fibrous skeleton anchors cardiocytes (heart muscle cells), giving them a structure to pull against during contraction, so this is a function.
2. It provides electrical insulation between atria and ventricles, preventing direct electrical conduction and ensuring proper contraction sequence, so this is correct.
3. The pumping mechanism is done by cardiocytes; the fibrous skeleton doesn't directly aid in pumping, so this is incorrect.
4. It provides structural support to the heart, maintaining its shape and organizing heart tissue, so this is a function.
5. Circulation for the heart is provided by coronary blood vessels, not the fibrous skeleton, so this is incorrect.

Answer:

A. Anchors the cardiocytes and give them something to pull against, B. Provides electrical insulation between the atria and ventricles, D. Provides structural support for the heart