Plant Organs SNC2D

Plant Tissues Recall that a plant is made up of 4 types of tissues:

Plant Tissues Recall that a plant is made up of 4 types of tissues: epidermal ground vascular meristematic

Plant Tissues Recall that a plant is made up of 4 types of tissues: epidermal (the “skin”) ground (the support) vascular (the transport) meristematic (growth)

Plant Organs These tissues group together to form organs that perform special functions.

Plant Organs These tissues group together to form organs that perform special functions. These organs are the: roots stems leaves flowers

Roots Roots anchor the plant in the soil

Roots Roots anchor the plant in the soil collect water and nutrients from the soil

Roots Roots anchor the plant in the soil collect water and nutrients from the soil store food

Roots The centre of the root is made up of ground and vascular tissue. The root is covered with protective epidermal tissue ending in the root cap, below which is a layer of meristematic tissue, which allows the root to grow.

Stems Stems support the leaves and flowers transport water and nutrients

Stems Again, ground tissue provides the strength and support while vascular tissue transports substances around, and epidermal tissue provides a protective covering, usually secreting a waxy substance known as the cuticle to reduce water loss.

Leaves Leaves photosynthesize (convert carbon dioxide and water to oxygen and glucose sugar)

Leaves The water and sugar are carried by the vascular tissues. CO2 and O2 (and excess water) enter and exit through openings in the epidermal tissue called stomata. Most of the leaf is made of a specialized ground tissue called mesophyll, which is where photosynthesis occurs.

glucose + oxygen  water + CO2 + energy Respiration Note that in order to use the energy stored in glucose for cellular functions, the cells must perform respiration: glucose + oxygen  water + CO2 + energy

glucose + oxygen  water + CO2 + energy Respiration Note that in order to use the energy stored in glucose for cellular functions, the cells must perform respiration: glucose + oxygen  water + CO2 + energy Remember: Respiration is NOT breathing. Plants use oxygen too (usually at night)!

Flowers Flowers produce seeds through sexual reproduction Flowering plants are called angiosperms.

To Do Answer questions #1 – 5 on page 60