A Level Biology Practice Exam

What is a septum?

1. A process of cell division

2. The walls that separate two chambers

3. Cells that act as connective tissue

4. A type of muscle tissue

The correct answer is: The walls that separate two chambers

A septum is indeed defined as the walls that separate two chambers, such as in the heart or certain types of biological structures. In the heart, for instance, the septum divides the left and right sides, ensuring that oxygen-rich and oxygen-poor blood do not mix. This separation is crucial for the efficient functioning of the circulatory system, allowing for the proper flow and distribution of blood. The other choices refer to different biological concepts. Cell division is a process that describes how cells replicate and divide to form new cells. Connective tissue cells serve to support, bind together, and protect tissues and organs in the body but do not specifically relate to the concept of a septum. Muscle tissue refers broadly to the tissues responsible for movement, including skeletal, cardiac, and smooth muscle, and again does not describe a septum.