The human nervous system: • The human nervous system is subdivided into two main sections i.e. Central nervous system – consisting of the brain and spinal cord Peripheral nervous system – consisting of nerves that conduct impulses to and from the brain and spinal cord. It includes 12 pairs of cranial nerves and 31 pairs of spinal nerves.

Jul 20, 2024 · Central Nervous System (CNS): Consists of the brain and spinal cord. Peripheral Nervous System (PNS) : Comprises all the nerves outside the CNS. Synapse : The junction between two neurons, where the impulse passes from one to the other.

Access easy-to-understand explanations and practical examples on key biology topics, from cells to ecosystems. Learn at your own pace with bite-sized verified content. brain and spinal cord. cranial nerves, spinal nerves, ganglia, sensory receptors. A nerve cell; the basic building block of the nervous system. Nerve. Types of Neurons.

Central nervous system The central nervous system consists of the brain and spinal cord. The brain plays a central role in the control of most bodily functions, including awareness, movements, sensations, thoughts, speech, and memory. Some reflex movements can occur via spinal cord pathways without the participation of brain structures.

The Autonomic Nervous System is divided into the Sympathetic innervation and the opposite, Parasympathetic innervations. The Sympathetic system speeds most processes up, eg faster heartbeat, faster rate of breathing and dilation of pupil.

Access easy-to-understand explanations and practical examples on key biology topics, from cells to ecosystems. Learn at your own pace with bite-sized verified content. What does the central …

Sep 10, 2022 · The central nervous system consists of the brain and the spinal cord. The brain is enclosed in a bony box called the cranium and spinal cord is protected by vertebral column. The brain and spinal cord are externally covered by protective covering called meninges.

Aug 27, 2020 · A colourful and comprehensive, summary of the Human Nervous System, as covered in grade 12 Life Sciences (Biology). Typed notes with thorough explanations using bullet points, pictures/labelled diagrams and tables - adapted from textbooks and class notes.

Feb 24, 2012 · The central nervous system (CNS) includes the brain and spinal cord (see Figure below). The two main divisions of the human nervous system are the central nervous system and the peripheral nervous system. The peripheral nervous system has additional divisions. This diagram shows the components of the central nervous system. The Brain

The Central Nervous System (CNS) Brain Protected by the bones of the cranium and is surrounded by three layers of membranes or meninges for protection. The cortex consists of cell bodies and is called the grey matter. The medulla consists of the nerve fibres or axons and is called the white matter. External structure of the human brain