intro Flashcards
anatomy
the science of the body structures and the relationship among them
dissection
carefully cutting apart of body structures to study their relationship
physiology
the study of the body functions-how the body works
levels of structural organization
- chemical level-smallest
2.cellular level
3.tissue level - organ level
5.system level
6.organismal level- largest
Chemical level
atoms-the smallest unit of the matter that participates in chemical reaction
molecules-two or more atoms joined together
carbon, hydrogen, oxygen, nitrogen, phosphorus, calcium, sulfur essentially maintaining life
DNA-DEOXRIBONUCLEIC ACID AND GLUCOSE found in body
Cellular level
molecules combine to form cells
the basic structural and functional unit of an organism
smallest living units in human body
Tissue level
a group of cells and surrounding materials that work together to perform particular function
4 types of tissue
muscular tissue
nervous tissue
epithelium tissue
connective tissue
Muscular tissue
contracts to make body parts move and in the process generates the heat
Epithelium tissue
covers body surfaces, lines hollow organs and cavities and forms the glands
Connective tissue
connects supports and protects body organ while distributing blood vessels to other tissue
Nervous tissue
carries information from one part of the body to another through the nerve impulses
organ level
at this level different types of tissue joins together
organs are structure that are composed 2 or more different types of tissues.
they have specific function and recognizable shape
ex. stomach, bones, heart, liver, skin, lungs
system
related organ with common function
ex. digestive system which breaks down the food and absorbs it
organism level
any living individual
all parts of the human body functioning together
