biological systems (animal + plant cells + additional)

• cell = basic building blocks of all living organisms
• nucleus = an organelle that controls the other parts of the cell, holds DNA
• cell wall = keeps the cell's shape together
• mitochondria = where aerobic respiration takes place to produce energy for the cell
• ribosome = synthesis of protein
• chloroplast = contains chlorophyll, which absorbs light energy for photosynthesis
• vacuole = stores all sap
• organelle = a structure that makes up a cell
• types of cells = red blood cell, white blood cell, sperm cell, egg cell, skin cell
• unicellular = bacterial
• multicellular = organisms (plants, animals)
• cells in multicellular organisms are arranged in a hierarchy
• tissues = groups of similar cells working together
• organisms = groups of tissue working together
• skeletons four main functions: support for the body, movement, protection for viral organs, synthesis + storage of blood cells
• plant cells have 3 additional organelles compared to animal cells which are: chloroplast, cell wall, vacuole
• muscle cells + muscle tissue = allows movement of body
• tendon joints bone to muscle
• ligament joins bone to bone
• cartilage = covers the bones to stop them from rubbing together which could lead to a lot of pain and eventually cause them to wear away due to friction
• stem cell = a cell that can turn into any specialised cell in the body.
• cell membrane = controls what goes in and out of the cell