The chromatophores of a frog play an important role in changing its body color.

In plant cells, there is a large bag called a vacuole.

He likes to take a walk in the park at dusk.

Cerebrospinal fluid plays an important role in protecting the brain and spinal cord.

Cnidarians are a type of marine life, including jellyfish and corals.

We should always remember the power of Kannon in difficult times.

A tesseract is a four-dimensional geometric shape.

The tesseract represents a four-dimensional geometric shape.

The 正五胞體 is a simple convex polytope in four dimensions, having five vertices.

A 5-cell is a simple convex polytope in four dimensions.