P1 Organisation

• Most animals and plants consist of different types of cells organised as tissues, organs and systems
• The human respiratory system is a body system adapted for efficient gas exchange
• The major nutrients required for a healthy diet are carbohydrates, proteins and lipids
• The digestive system breaks down large molecules of food, which are then absorbed into the bloodstream
• Multicellular organisms require transport systems to supply their cells and remove waste products
• In humans, one of the functions of the circulatory system is to transport substances
• Plant cells, tissues and organs are adapted to their functions
• The stem, root and leaves form an organ system that transports substances into, around and out of a plant
• Health is the state of physical and mental well-being
• Factors work together and affect physical and mental health
• A disease is a disorder that affects an organism's body, organs, tissues or cells