Seaweeds are macroscopic, multicellular marine algae that come in red, brown, and green varieties. Red seaweeds like Kappaphycus and Betaphycus are important sources of carrageenan, used in foods like yogurt and pudding. Brown seaweeds like Phaeophyceae form important habitats and food sources in cold northern waters. Green seaweeds, the most diverse group with over 7000 species, contain chlorophyll and can be found in various aquatic habitats. Seaweeds have many uses including human food, cosmetics, agriculture, and medicine.

2. SEAWEEDS
refers to several species of
macroscopic, multicellular,
marine algae. The term
includes some types of red,
brown, and green algae

3. TYPES OF SEAWEEDS
• Green seaweed is the most diverse
group of algae, with more than 7000
species growing in a variety of
habitats.
Like the plants, the green algae
contain two forms of chlorophyll,
which they use to capture light
energy to fuel the manufacture of
sugars, but unlike plants they are
primarily aquatic.

5. • Red seaweeds - The red algae
Kappaphycus and Betaphycus are
now the most important sources of
carrageenan, a commonly used
ingredient in food, particuarly
yoghurts, chocolate milk and
repared puddings.

7. • Brown Seaweeds- the
Phaeophyceae or brown algae is a
large group of mostly marine
multicellular algae, including many
seaweeds of colder Northern
Hemisphere waters.
They play an important role in
marine environments, both as food and
for the habitats they form.

9. Uses of Seaweeds
Human food

10. Cosmetics
Facial
creamSoap
Shampoo

11. Seaweed as agricultural fertilizers

12. Carrageenans

13. Medicinal Uses

15. • For Five Points Define what is
seaweed?(3pts.)
• Give the three classifications of
seaweeds.
• Describe the following:
– Red Seaweed
– Brown Seaweed
– Green Seaweed
• Why seaweed is important? 5pts