Plant OrgansPlant Organs

SNC2DSNC2D

Plant TissuesPlant Tissues

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

Plant TissuesPlant Tissues

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

epidermalepidermal groundground vascularvascular meristematicmeristematic

Plant TissuesPlant Tissues

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

epidermal (the “skin”)epidermal (the “skin”) ground (the support)ground (the support) vascular (the transport)vascular (the transport) meristematic (growth)meristematic (growth)

Plant OrgansPlant Organs

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

Plant OrgansPlant Organs

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

These organs are the:These organs are the: rootsroots stemsstems leavesleaves flowersflowers

RootsRoots

RootsRoots anchor the plant in the soilanchor the plant in the soil

RootsRoots

RootsRoots anchor the plant in the soilanchor the plant in the soil collect water and nutrients from the soilcollect water and nutrients from the soil

RootsRoots

RootsRoots anchor the plant in the soilanchor the plant in the soil collect water and nutrients from the soilcollect water and nutrients from the soil store foodstore food

RootsRoots

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

StemsStems

StemsStems support the leaves and flowerssupport the leaves and flowers transport water and nutrientstransport water and nutrients

StemsStems

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

LeavesLeaves

LeavesLeaves photosynthesize (convert carbon dioxide and photosynthesize (convert carbon dioxide and

water to oxygen and glucose sugar)water to oxygen and glucose sugar)

LeavesLeaves

The water and sugar are carried by the vascular tissues. The water and sugar are carried by the vascular tissues. COCO22 and O and O22 (and excess water) enter and exit through (and excess water) enter and exit through

openings in the epidermal tissue called stomata. openings in the epidermal tissue called stomata.

Most of the leaf is made of a specialized ground tissue Most of the leaf is made of a specialized ground tissue called mesophyll, which is where photosynthesis called mesophyll, which is where photosynthesis occurs.occurs.

RespirationRespiration

Note that in order to use the energy stored in Note that in order to use the energy stored in glucose for cellular functions, the cells must glucose for cellular functions, the cells must perform perform respirationrespiration::

glucose + oxygen glucose + oxygen water + CO water + CO22 + energy + energy

RespirationRespiration

Note that in order to use the energy stored in Note that in order to use the energy stored in glucose for cellular functions, the cells must glucose for cellular functions, the cells must perform perform respirationrespiration::

glucose + oxygen glucose + oxygen water + CO water + CO22 + energy + energy

Remember:Remember:

Respiration is NOT breathing.Respiration is NOT breathing.

Plants use oxygen too (usually at night)!Plants use oxygen too (usually at night)!

FlowersFlowers

FlowersFlowers produce seeds through sexual reproductionproduce seeds through sexual reproduction

Flowering plants are called angiosperms.Flowering plants are called angiosperms.

To DoTo Do

Perform the dissection of a flower as outlined Perform the dissection of a flower as outlined on the handouton the handout

Answer questions #1 – 5 on page 60Answer questions #1 – 5 on page 60