Microteaching on terms used in filtration .Pharmaceutical Engineering
Human nervous system__by_Aarohi Gupta_for_class_10-a
1.
2. • It is system that helps all other
system of our body to work.
• Its function is to coordinate the
activities of our body.
• The human nervous system
receives information from the
surrounding , processes it ,
interprets it and respond quickly.
3.
4. • OUR NERVOUS SYSTEM IS MADE UP OF
SPECIAL CELLS CALLED NEURONS
• THE CELL BODY OF A NEURON IS LIKE A
TYPICAL ANIMAL CELL WHICH CONTAIN
CYTOPLASM AND NUCLEUS
5. THE NEURONS HAVE 3 COMPONENTS :
AXON : It is the longest fibre on the cell body of
neuron. it has an insulating and protective sheath of
myelin around it.
DENDRITES : It picks up the nerve impulse
(message) from receptors and the passes to cell
body and then to axon.
7. • The human central nervous system is made up of;
• 1. Brain
• 2. Spinal cord
• The complete central nervous system consist of up
to 100 billions inter-neurons
• Brain and spinal cord are protected in protected
bony armour, the skull and the vertebral column.
• Both the spinal cord and brain are covered in three
continuous sheets of connective tissue called
meninges.
• A plasma like fluid, the cerebrospinal fluid (CSF)
bathing the neurons of CNS is yet another
protection to CNS.
8.
9. • Brain is the highest coordinating centre in the body
• Located inside the skull (at the top of the spinal chord)
• protected by a bony box in the skull-Cranium
• Surrounded by 3 membranes-Meninges
• The space between the membranes id filled with a
cerebro spinal fluid, which protects the brain from
mechanical shocks
10. ►The brain of all vertebrates develops from
three swellings at the anterior end of the
neural canal of the embryo.
►Human brain is divided into three parts;
11.
12.
13. • Reflex Action-This is a rapid, automatic
response to a stimulus which is not
under voluntary control of the brain. The
stimulus produces the same response
every time
• Sneezing and Blinking are two examples
of Reflexes.
14. • REFLEXES are very fast, and Most Reflexes
Never Reach the Brain.
• Sensory Neurons carry impulses from
RECEPTORS to the spinal cord.
• Motor Neurons carry impulses from the spinal
cord to the EFFECTORS.
• Within the spinal cord, motor and sensory
neurons are connected by INTERNEURONS.
15.
16. • Reflex Arc- The pathway (or route)taken by nerve
impulses in a reflex action