Unit 1 AOS 2

Most multicellular plants, and have specialised conducting systems

Type of plant tissue made of cells that can undergo cell division and continue dividing for the rest of the plants life

Type of plant tissue made of specialised cells that can’t divide

2 conducting systems - Above Ground Shoot System - Below Ground Root System

2 transport systems - Xylem tissue - Phloem tissue

• Water enters root cells via osmosis • Water moves across cells the the cortex to xylem

2 pathways - Extracellular Pathway - Cytoplasmic pathway

Contains 2 types of water conducting cells, moves water from roots to the rest of plants, transpiration pulls water upwards

Tracheids and Vessels, both have thick cell walls, lose live contents, meaning they aren’t living

Water diffuses into the roots in the gaps between the cells

Mineral ions are passively diffused into the cytoplasm of the next cell or are taken up by active transport in root hair cells

The passing out of unused water into the atmosphere. It occurs in leaves through air space in mesophyll tissue and is stomata

Guard stomata, when less water in the cell, stomata close, when more water, stomata opens

Pores in epidermal tissues surrounded by 2 guard cells

Water is pulled upwards from transpiration and pressure in roots pushes it. Water column doesn’t break from adhesion and cohesion

Water creeps up plant cells by connecting to other substances eg. lignin

Water molecules staying together during movement

Process of transporting sugars and inorganic materials

Composed of sieve tubes and other cells, process of moving sugars and other organic material

No nucleus but is living, sieve cells form rows of elongated cells, forming sieve plates and perforated cell walls, companion tubes are closely associated

Formed by cells of similar types or a single type acting to perform a specific function.

• Epithelial • Muscle • Connective • Nervous

Covers internal and external surfaces

Contracts and enables movement