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Anatomy
Study of structure and how parts are related to one another
Physiology
Study of the function of the body, how parts work and perform life-sustaining function.
Complementary structure and function
What something can do based how it’s structure
epithelial tissue
muscle tissue
nervous tissue
connective tissue
Four types of tissue
Chemical
Most basic level of organization
chemical
cellular
tissue
organ
organ system
organism
Six levels of organization, simplest to most complex
Interdependent
Cells cannot function without the other
Maintaining boundaries
Movement
responsiveness (excitability): detect/respond to change in environment. homeostasis.
digestion
Metabolism
excretion
reproduction: cell and person level
growth: cellular reproduction
Eight requirements for life
Nutrients
Oxygen: Required to make ATP, most reactions in the body
Water: fluid balance. Body is 50-60% water
Normal body temperature (37)
Atmospheric pressure
Five survival needs that must be present to meet needs of he body
Hypothermia
Body gets too cold. Can slow reactions, which will eventually stops metabolism
Hyperthermia
Body gets too hot. Speeds reactions, eventually cannot function.
Homeostasis
A dynamic state of equilibrium, body keeps internal condition relatively stable. Core of body functions.
Homeostatic control (endocrine system and nervous system)
Cells and organ systems communicate with one another to ensure homeostasis is maintained.
Receptor
Thing that senses when something is off (homeostasis). Is continually sending signals to control center.
Afferent pathway
Pathway in which receptor is continually sending signals to the control centre
Control centre
Place n the body that controls area being monitored. Compares information given by receptor to the desired level (set point)
Set point
Desired level of something in order to maintain homeostasis. Control centre compares it to data received by receptor.
Efferent pathway
When data is out of range (homeostatic imbalance), control centre sends signals along this pathway to effector.
Effector
Effects change when homeostatic imbalance. Control centre sends it signals along the efferent pathway, provides feedback
Feedback loop
Information from receptor provides feedback to effector that causes a change in function
Negative feedback
Variable changes in opposite direction to initial change. Feedback prevents severe change.
Positive feedback (ex: blood clotting, oxytocin when giving birth)
Feedback enhances original response. Gets further from starting point.
Homeostatic imbalance
Core of all disease; issue with negative feedback loop
Ventral body cavity
Cavity contains internal organs
Viscera
Collective name of internal organs
Thoracic cavity
Abdominal cavity
Separated by diaphragm
Two main cavities in ventral cavity
Two lateral plural cavities (lungs)
Mediastinum
Sub cavities of the thoracic cavity
Serosa (serous membrane)
Double layered membrane that lines walls of ventral cavity andouter surface of visceral organs
Parietal serosa
Lines the cavity walls. Outer layer of balloon in balloon demo.
Visceral serosa
surrounds organs. Inner layer of balloon touching hand in demo.
Serous fluid
Fluid provides lubrication in serous cavity. Avoids friction
Serous cavity
Space between parietal and visceral serosa. Air in balloon in demo. Fillled with fluid.
Right upper quadrant
Left upper quadrant
Right lower quadrant
Left lower quadrant
Four abdominopelvic quadrants