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The withdrawal reflex is a spinal reflex that ensures moving away from potentially damaging stimuli.
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The spinal cord is the part of the central nervous system running inside the spinal column from which spinal nerves branch out.
The arms are moved by flexor and extensor muscles.
The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
Adrenaline, also known as epinephrine, is a hormone produced in our body in stressful situations and plays an important role in the fight-or-flight response.
The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.
The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.
The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.
Neurons are cells specialised for transmitting electric signals.
Neurons transmit electrical signals via chemical and electrical synapses.
This animation demonstrates the fine molecular structure and mechanism of muscles.