The Body: Intro Flashcards
Define organ system
A group of organs that work together to fulfil several special functions / purposes within the body
Organs
Aggregation of tissues performing similar functions
Tissues
A group of cells that work together to perform a particular function
List some key functions of the body
Control and regulation
Environmental exchange
Growth and energy
Support and movement
Fluids and transport
Define homeostasis
Self-regulating process by which an organism can maintain stability whilst adjusting to changing internal/external conditions
Eg. Temp, blood pressure, blood glucose levels
Negative feedback
Correct the change detected
Amplifies the change detected
Positive
List problems that can arise when you can’t regulate systems
High good pressure
Water retention
Respiration and breathing issues
Diabetes
When interactions with environment go wrong what can happen?
Pathogens and viruses evade immune response
Bodies date it relatively harmless chemicals as being dangerous= develop allergies or auto-immune disease
Level of organisation
Human body
Organ system
Organ
Tissues
Cells
Molecules
Chemicals
List 7 organ systems
REIC NUD
Reproductive
Endocrine
Immune
Cardiovascular
Nervous
Urinary
Digestive
Function of immune system
Protect against :foreign bodies
And against disease
Function of digestive system
Process and digest food
Store energy
Protection
Main organs of digestive system
Stomach
Liver
Gallbladder
Pancreas
Intestines
Function of urinary system
Excrete waste
Control water balance
Store urine
Regulate ion and pH
