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level: Tissues, organs and systems

Questions and Answers List

level questions: Tissues, organs and systems

QuestionAnswer
Define tissuesa group of cells that are specialised to work together to carry out a particular function
How are erythrocytes specialised for their functionThe function is to carry oxygen in the blood. - they have a biconcave disc shape providing them with a large surface area for gas exchange - they have no nucleus allowing them to have more room for haemoglobin
How are neutrophils specialised for their functionThe function is to defend the body against disease - has a flexible shape allowing them to engulf foreign particles or pathogens - have many lysosomes in their cytoplasm containing digestive enzymes to break down and engulf the particles
How is sperm specialised for their functionThe function is to fertilise eggs - has lots of mitochondria so that they have more energy - acrosomes contains enzymes for quicker digestion to penetrate egg
How are palisades specialised for their functionThe function is photosynthesis - contains many chloroplast that absorbs light - the walls are thin for quicker diffusion or CO2 into cells
How are root hairs specialised for their functionThe function is to absorb water and mineral ions from the soil - they have a large surface area for absorption - thin, permeable cell wall for easier entry of ions - cytoplasm contains extra mitochondria providing more energy for active transport
How are guard cells specialised for their functionThey are used for gas exchange for photosynthesis
Define organa group of different tissues that work together to perform a particular function
Give examples of some organs- lungs - leaf
Define organ systemorgans that work together for a particular system