Serge Francois | Human Anatomy and Physiology


Presentation Description

Serge Francois had medical research of the regular functionality in living systems.Serge Francois focus is in how microorganisms, organ methods, body parts, skin cells, and organ molecules carry out the chemical substance or actual physical features that are available in a living system.


Presentation Transcript

Human Anatomy and Physiology :

Human Anatomy and Physiology Introduction Serge Francois


Topics Autonomic nervous system Endocrinology Cardiovascular physiology Immunology Respiratory physiology Renal physiology Digestion Reproductive physiology Serge Francois




Homeostasis All organs interact All cells of organs bathed in internal fluid Cells exist if fluid remains constant in quantity and quality (osmosis) Fluctuations occur within narrow limits Serge Francois

Feedback mechanisms:

Feedback mechanisms Control system Sensor Set point adjustment Disturbance Error signal Inverted amplifier Negative feedback -

Negative feedback:

Negative feedback Beneficial e.g. perspiration Disturbance (increase in body temp.) Sensor (nervous system) Inverted amplifier (decrease in temp.) Doesn’t prevent displacement Restores stability close to operating parameters (set point adjustment)

Feedback mechanisms:

Feedback mechanisms Control system Sensor Disturbance Signal Amplifier Positive feedback Output +

Positive Feedback:

Positive Feedback Rare Mostly destructive e.g. congestive heart failure Disturbance (inability of heart to pump blood) Sensor (nervous system) Amplifier (increase in heart muscle contraction, further impeding pumping ability)

Control systems:

Control systems Integration (CNS) Stimulus Response Effector (muscle, gland) Receptor (cell) Afferent Efferent


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