G4 First Term - Nervous System PDF

G4 first term ENG. Doha Nervous system human and animals that have bones. Mammals ✓ Human, elephant, and dog have same nervous system Sensory organ: 1. …………………………...

G4 first term ENG. Doha Nervous system human and animals that have bones. Mammals ✓ Human, elephant, and dog have same nervous system Sensory organ: 1. ………………………… 4. …………………………….. 2. ………………………… 5. ……………………………... 3. ………………………… Receives “takes” information from the Function of environment. sensory organ Note: sensory organs contain special type of nervous system called “sensory receptors Sensory They are found in different places of the body, and organs they are responsible for receiving information from the surrounded. Nervous system consists of: Brain: ✓ the main control center of the body. Nerves: ✓ carry massage from the brain to the spinal cord and other parts. ✓ And from other parts to the spinal cord to the brain. Spinal cord: ✓ carries massages “signals” from the brain to the body Page | 1 ✓ and from the body to the brain.  G4 first term ENG. Doha Functions of the nervous system: 1. Collecting information about what happens inside and outside the body then sending this information to the brain. 2. Understanding what this information means. 3. According to ‫ حسب‬this information a signal is sent to the body telling it what to do. Note: Some of these nerves directly connected to the brain such as: The eyes and the heart. The brain can process what see faster than listen. Why?? components of the nervous system are connected together to transmit ‫ تنقل‬information throughout the body. Every part of the nervous system cannot work independently. Memory in the brain: Playing a role of responding the smell of pizza…. Some massages so fast that you cannot realis it, sent Reflex action to the brain automatically. Such as: breathing, heart beating. Page | 2