Levels of organisation

What are the levels of organisation

Organelle cell tissue organ organ system organism

What are organelles

Tiny structures inside cells that perform certain functions

Give 3 examples of organelles amd there function

Nucleus - cointains dna mitochondria- site of respiration ribosomes- site of protein synthesis

What is a cell

Basic unit of life that can be specialised to perform specific functions

Give 3 examples of specialised cells and there functions

Red blood cells- carry oxygen nerve cells - transmit electrical signals root hair cells - absorb water and minerals

What is a tissue

Group of cells that work together to perform a certain function

Give examples of tissues and there functions

Muscle tissues- contract to produce movement xylem tissues- transport water in plants

What is an organ

Group of simular tissues that work together to perform a certain function

Give examples of organs and there functions

Heart-pumps blood lungs-perform gas exchange leaf - photosynthesis in plants

What is an organ system

Group of organs that work together for a common function

Give examples of organ systems and there functions

Circulatory system heart blood vessels blood

Digestive system stomach intestine liver

Respiratory system lungs trachea bronchi

What is an organism

A complete living thing composed of multiple organ systems working together