Lecture notes test 1 Flashcards
What is anatomy?
Anatomy is the science that deals with structure, that is, how a part of the body is put together
What is Physiology?
Physiology is the science that deals with function that is how a part of the body works
What determines function?
Structure determines function
What are the levels of structural organization?
Chemical level, Cellular level, Tissue level, Organ level, System level and organismal level
Chemical Level
The chemical level consists of all the atoms and molecules that make up the body, atoms are the smallest units of matter that participate in chemical reactions; molecules consist of two or more atoms held together by chemical bonds. Ions are charged particles and cations are positively charged and anions are negatively charged.
Cellular Level
The Cellular level consists of cells, the basic units of structure and function.
Tissue Level
The Tissue level consists of tissues, group cells and their intercellular substance that work together to perform a specific function
Organ Level
The Organ level consists of organs, structures composed of two or more tissues that work together to perform a specific function. They usually have a recognizable shape
System Level
The System level consists of systems, groups of organs that work together to perform a specific function
Organismal Level
The human organism is composed of 11 body systems that work together to maintain homeostasis
Homeostasis
homeostasis is a condition in which the body attempts to maintain balance in its internal environment even though many forces attempt to disrupt it.
Conditions that must be kept in balance…
blood sugar level, blood pressure and body temperature
Interstitial fluid
The body’s internal environment is the fluid between the cells
Extracellular fluid
interstitial fluid is found outside cells
Examples on ECF
blood plasma, lymph plasma, cerebrospinal
fluid, aqueous humor, and vitreous body
intracellular fluid
any body fluid inside cells
