FPPS 11 [LEC] - 1/28/26

Wood is ___ material for several products

raw

Wood is

• xylem tissue

• c____

• s____

• s____

• varied physical and structural characteristics

conduction

storage

support

Main cells comprising the xylem tissue

• P

• V

• T

• F

Parenchyma

Vessels

Tracheids

Fibre

What is the importance of knowing the structure of wood?

• i_____

• proper u_____ and m______

wood identification

proper utilization and maximization

Wood id is the establishment of the identity of a wood sample as being _____ to or identical with an already known species.

similar

Wood ID importance:

• basis for r____ collection

revenue

Wood ID importance:

• assists plant t_____

taxonomists

Wood ID importance:

• aids in checking f____ in buying lumbers

frauds

Wood ID importance:

• aids in wood s_____ and t_____ research studies

science

technology

Wood ID importance:

• helps in tracing the p_____ of a certain species

phylogeny

Wood ID importance:

• tool for conservation of c_____ heritage

cultural

Bases of wood identification:

1. Physical features

   • identifying based on your senses

Bases of wood identification:

1. Structural features

   • characteristics based on wood structure

Properties common to all wood where it is composed mainly of carbon atoms

organic

Properties common to all wood where it exhibits different properties at different sections

• an = negative

• tropic

Anisotropic

Properties common to all wood where it loses and gains moisture

Hygroscopic

Properties common to all wood where it is susceptible to what?

decay

Properties common to all wood where it produces energy by burning

Combustible

Properties common to all wood where it is a good _____ when dry, good _____ when wet

insulator

conductor

Properties common to all wood where it is renewable

Renewable

Properties common to all wood where it can be manafactured into different products

Versatile

Properties common to all wood where it does not require complicated equipment

Easy to work with any tools

The woody portion of the vascular tissue

Xylem

The inner bark of the vascular tissue, concerned with plant foods distribution

Phloem

Meristematic tissue located in between the xylem and phloem

vascular cambium

The innermost portion of the stele

Pith

Tissue that function for lateral distribution of materials within the tree

Wood rays

Dead portion of the xylem, it is dark in color due to extractives

Heartwood

Portion that surrounds the heartwood, composed of living cells

Sapwood

Resistance to decay is higher: Heartwood or Sapwood?

Heartwood

More difficult to dry: Heartwood or Sapwood?

Heartwood

Has High Density: Heartwood or Sapwood?

Heartwood

More Durable: Heartwood or Sapwood?

Heartwood