Student’s question (8): “Can you explain what a valve is? Also, how are the septum and valves related; what do they have in common”

This post is in response to a student’s question.

A  valve is membranous flap or fold of tissue a hollow organ that enforces one-way traffic. Examples of valves are cardiac/heart valves and venous valves.  Reference

A Cardiac valve is therefore a membranous fold in the heart that enforces blood flow in one direction.

There are 4 cardiac valves namely: The Tricuspid Valve ( between the right atrium and the right ventricle. The Bicuspid valve ( Between the left atrium and the left ventricle). The Pulmononic valve ( between the right ventricle and the pulmonary artery) and the Aortic Valve ( between the left ventricle and the aorta).

MNEMONIC: LAB RAT  ( Left atrium Bicuspid and Right atrium Tricuspid).

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What is the septum of the heart?

It is the partition that divides the heart into two sides longitudinally. It separates the right side of the heart from the left side.

It is important to prevent mixing of blood from both sides of the heart ( Oxygenated and de-oxygenated blood).

The septum therefore maintains and regulates  the flow in just like the cardiac valves.

Do you have any additional questions about A & P II? Post them in the comment section below and we would get back to you ASAP!!

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