B1: Levels of Organisation Flashcards
List 3 examples of organ systems.
Circulatory system
Respiratory system
Reproductive system
Skeletal system
Urinary system
Nervous system
Digestive system
What is the function (job) of the circulatory system?
Transports materials around the body in the blood.
Multicellular organisms have 5 levels of organisation.
List the levels in order of complexity (least complex first)
Cells
Tissues
Organs
Organ Systems
Organism
Many nerve cells joined together make a….
Nerve tissue
Identify 3 plant organs
Leaf - absorbs light for photosynthesis
Stem - holds plant upright
Root - anchors plant into ground and takes in water/minerals.
List 3 examples of specialised cells.
Red Blood Cell
Nerve Cell
Ciliated epithelial cell
Root hair cell
White blood cell
Muscle cell
What is an organ?
An organ is a gorup of tissues that work together to perform a certain function.
E.g. the digestive system contains many organs to digest food.
What is a tissue?
A group of similar cells working together to perform a specific function (job).
e.g. muscle tissue - contracts to allow movement.
What is meant by a specialised cell?
A cell that has adapted speciali features to carry out a specific function (job).
e.g. sperm cell has a tail to swim to the egg
An organism made from many cells working together is called a…
Multicellular Organism
