Reflex arcप्रतिवर्ती चाप

NCERT Fig 6.2 · interactive diagram

Parts and their functions

• Receptor (ग्राही) — Detects the stimulus (e.g. heat in the skin) and starts the impulse.
• Sensory neuron (संवेदी न्यूरॉन) — Carries the impulse from the receptor to the spinal cord.
• Relay neuron (प्रसारण न्यूरॉन) — Inside the spinal cord; passes the message from the sensory neuron to the motor neuron.
• Spinal cord (मेरुरज्जु) — Reflex arcs are formed here, where nerves from the body meet. Information also goes on to the brain.
• Motor neuron (प्रेरक न्यूरॉन) — Carries the command from the spinal cord to the muscle.
• Effector (muscle) (कार्यकर (पेशी)) — The muscle that acts — e.g. pulls the hand away from the flame.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 6.2. Report a mistake