EVERYDAY SCIENCE

Detailed explanation-1: -Thalamus: The thalamus is the relay center of the brain. It receives afferent impulses from sensory receptors located throughout the body and processes the information for distribution to the appropriate cortical area. It is also responsible for regulating consciousness and sleep.

Detailed explanation-2: -The brain is a soft, spongy mass of nerve cells and supportive tissue. It has three major parts: the cerebrum, the cerebellum, and the brain stem. The parts work together, but each has special functions.

Detailed explanation-3: -The central nervous system is the body’s processing centre. The brain controls most of the functions of the body, including awareness, movement, thinking, speech, and the 5 senses of seeing, hearing, feeling, tasting and smelling. The spinal cord is an extension of the brain.

Detailed explanation-4: -They are sometimes referred to as peripheral ganglia, as they exist outside of the Central Nervous System (CNS). Ganglia (biology definition): Mass of nerve tissue; a group of nerve cell bodies, especially nerve cells external to the brain or spinal cord. Examples are dorsal root ganglia and autonomic ganglia.

Detailed explanation-5: -Nervous tissue consists of two cells: nerve cells or neurons and glial cells, which helps transmit nerve impulses and also provides nutrients to neurons.