organisation Flashcards
describe the levels of organisation in a living organism
cells -
basic building blocks of life, e.g. red blood cell
tissues -
a group of similar cells working together to perform a specific function, e.g. muscle tissue
organs -
a group of similar tissues working together to perform a specific function, e.g. heart
organ system -
a group of similar organs working together to perform a specific task, e.g. digestive system
organism -
a group of organ systems working together to make up an individual, e.g. human
describe the function of an epidermal tissue
a protective layer of cells covering plant surfaces
describe the function of a mesophyll tissue
located in the leaves to help with photosynthesis
describe the function of roots
anchors the plant and absorbs water and minerals
describe the function of a stem
supports the plant and transports water, minerals, and sugars between the roots and leaves
describe the function of the leaves
main site of photosynthesis where sunlight is captured to make food
describe the function of the root system
made up of roots and branches which are responsible for absorbing nutrients
describe the function of the shoot system
made up of stem, leaves and flowers which are responsible for photosynthesis, reproduction and transportation
describe the circulatory system
transports blood, oxygen, nutrients, and waste throughout the body (includes the heart and blood vessels)
describe the digestive system
breaks down food to absorb nutrients (includes the stomach, intestines, liver, and pancreas).
describe the respiratory system
facilitates the exchange of gases (oxygen and carbon dioxide) between the body and the environment (includes the lungs and trachea).
describe the nervous system
transmits signals between different parts of the body to coordinate functions (includes the brain, spinal cord, and nerves).
describe the musculoskeletal system
provides structure and enables movement (includes muscles, bones, and joints).
describe the reproductive system
responsible for producing offspring (includes ovaries and testes in animals).
describe homeostasis
the regulation and maintenance of a stable internal environment within an organism. —» temperature regulation
-»blood sugar levels
