- Cells
- Tissues
- Organs
- Organ systems
Every cell in the human body is both an independent unit and an interdependent
part of a larger community – which is the entire organism.
Cells Tissues Organs Organ Systems
- the basic unit of - a group of cells - a group of - 11 organ systems in
structure and that perform a different types of the body
function in living certain function tissues that work - nervous system
things - epitheliel: interior together to - integumentary
- individual cells in and exterior perform a single - skeletal
multicellular glands function - muscular
organisms are - connective: - a group of organs - circulatory
specialized – supports and that perform - respiratory
suited to perform connects parts closeley related - digestive
a particular - nervous: transmits functions are - excretory
function nerve impulses organ systems - endocrine
- muscle: allows the - reproductive
body to move - immune
Homeostasis is the process in which organisms
keep internal conditions relatively constant
despite changes in external environments.
Homeostasis is maintained by feedback
inhibition, or negative feedback, which is
when a stimulus produces a response that
opposes the original stimulus.