🧠 Nervous System – Complete Notes (Easy & Exam Ready)
🧠 Nervous System – Complete Notes (Easy & Exam Ready) 🔹 Introduction The Nervous System is the master controlling system of the human body. It controls, coordinates, and integrates all body activities. It also helps us communicate with the external environment. The structural and functional unit of the nervous system is the neuron . 🔹 Structure of Neuron Dendron – receives impulses Axon – sends impulses 🔹 Classification of Nervous System Central Nervous System (CNS) – Brain & Spinal Cord Peripheral Nervous System (PNS) – Cranial & Spinal nerves Autonomic Nervous System (ANS) – Sympathetic & Parasympathetic 🔹 Brain Structure Cerebrum – memory, intelligence Thalamus – emotions Hypothalamus – temperature, hunger, sleep Cerebellum – balance Medulla – breathing & heartbeat 🔹 Cranial Nerves There are 12 pairs of cranial nerves controlling smell, vision, facial movement, and vital functions. 🔹 Spinal Cord Located inside th...