What type of nervous system usually has two nerves branching from brain like structure at the head end animal?

The type of nervous system that usually has two nerves branching from a brain-like structure at the head end of an animal is called the ladder-like nervous system or the nerve net. This type of nervous system is commonly found in simple invertebrates, such as flatworms (planarians) and cnidarians (jellyfish, sea anemones, and corals).

The nerve net is a decentralized nervous system, meaning that it does not have a central brain or spinal cord like the vertebrate nervous system. Instead, the nerve cells (neurons) are distributed throughout the body in a mesh-like network, with no clear distinction between sensory, motor, and integrative functions.

The brain-like structure at the head end of some animals with a nerve net is called a ganglion. It is a cluster of nerve cells that serves as a center for receiving and processing sensory information, and coordinating motor responses. However, the ganglia in these animals are not as complex as the brains found in vertebrates and are not responsible for higher-level cognitive functions.

The ladder-like nervous system allows for basic coordination of movement, sensory perception, and simple behavioral responses to environmental stimuli. It is more limited in terms of complexity and processing capabilities compared to the centralized nervous systems of higher animals.