Introduction to the Human Body Flashcards
chemical level
elements and molecules form the smallest level of organisation. (hydrogen, carboon, oxygen, nitrogen, proteins, lipids, carbphydrates, nucleic acids)
cellular level
smallest independently functioning unit of a living organism
tissue level
group of similar cells that are specialised to perform common functions.
4 primary tissues: epithelial, connective, muscle, nervous
organ level
- structures that contain 2+ primary tissues.
- each organ performs 1+ specific functions
organism
represents the entire functioning individual
describe the basic structure of the cell
consists of flexible membranes that enclose cytoplasm, a water-based cellular fluid together with a variety of tiny functioning units called organelles.
organs in the integumentary system
skin, hair, nails