CIE IGCSE Biology: 复习笔记:8.1.2 Root Hair Cells

CIE IGCSE Biology: 复习笔记:8.1.2 Root Hair Cells

Root Hair Cells

  • Root hairs are single-celled extensions of epidermis cells in the root
  • They grow between soil particles and absorb water and minerals from the soil
  • Water enters the root hair cells by osmosis
  • This happens because soil water has a higher water potential than the cytoplasm of the root hair cell

Structure of the root, IGCSE & GCSE Biology revision notes

Structure of the root

  • The root hair increases the surface area of the cells significantly
  • This large surface area is important as it increases the rate of the absorption of water by osmosis and mineral ions by active transport