Cells

• Ribosomes are responsible for protein synthesis in the cell.
• Cell membrane controls the movement of substances into and out of the cell
• Most cell activities occur in the cytoplasm
• nucleus is essential for cell division, controls the cell activities such as cell growth and repair of worn-out parts and stores genetic information
• Chloroplasts contain chlorophyll that traps sunlight for photosynthesis to make food
• Vacuoles, which contain cell sap in plant cells stores dissolved substances such as water, mineral salts and sugar (amino acids)
• the small numerous vacuoles in animal cells store food and water
• mitochondria breaks down glucose in the presence of oxygen to release energy for cell activities
• Red blood cells contains haemoglobin which transports oxygen from lungs to all parts of the body
• Red blood cell lacks a nucleus, this enables cells to store/carry more oxygen
• Red blood cells are biconcave, circular in shape. This increases surface-area-to-volume ratio and thus increases blood diffusion efficiency