Chapter 1.5 Flashcards
The body’s structural hierarchy
Organism – organ systems - organs – tissues Dash cells – organelles - molecules - atoms
Organism
A single complete individual
Organ system
A group of organs with a unique collective function. EX: circulation, respiration, digestion
11 organ systems
MR DICEL RUNS
Muscular
Respiratory
Digestive
Integumentary
Circulatory
Endocrine
Lymphatic
Reproductive
Urinary
Nervous
Skeletal
Organ
A structure composed of two or more tissue types that work together to carry out a particular function
Tissue
A mess of similar cells and cell products that forms a discrete region of an organ and performs a specific function
Cells
The smallest unit of an organism that carry out the basic functions of life
Organelles
Microscopic structures in a cell that carry out its individual functions
Molecules
A particle composed of at least two atoms
Atoms
The smallest particles with unique chemical identities
Reductionism
The theory that a large, complex system such as the human body can be understood by studying it’s simpler components
Holism
The theory that there are emergent properties of the whole organism that cannot be predicted from the properties of it separate parts; human beings are more than sum of the parts
