specific cells Flashcards

1
Q

red blood cell (no nucleus, mitochondria, endoplasmic reticulum)

A
  1. contains haemoglobin → which binds easily with oxygen and transports it around the body
  2. circular, biconcave shape → increasing surface area to volume ratio for faster diffusion of oxygen in and out of the cell
  3. lacks nucleus → to store more haemoglobin for transportation of oxygen
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2
Q

root hair cells (numerous mitochondria → ATP for active transport)

A
  1. long and narrow root hair extension → increase surface area to volume ratio for faster osmosis of water molecules and diffusion of mineral salts in and out of cell
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3
Q

xylem vessels (cellulose cell wall, dead tissues, no cell content)

A
  1. long, hollow and continuous tubes without cross-walls → to transport water from roots to leaves with no obstruction
  2. lacks protoplasm → so there is no resistance to water flow
  3. walls thickened with lignin → to provide structural/mechanical support and prevent collapse of vessel during transport of water
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