presentasi biologi 3 tahun lalu

1. BIOLOGY PRESENTATION
Dwi Muktianto (11) By
Kukuh Prasetyo (18)
Sabiq Farhan (26)
Yusuf Fajar R (32)

2. http://photography.nationalgeographic.com/staticfiles/NGS/Shared/StaticFiles/Photography/Images/Content/sea-star-pair-758303-sw.jpg

5. Echinoderm Classes
–
• Multiple arms radiating from central
disk
• Tube feet on bottom
• “Starfish”
• Active predators
– feed on bivalves
– use suction cups to pull open the
shells with forces of up to 5kg
• The stomach is eversible, and can be
partially inserted inside prey’s shell
(enzymes but no toxins)

12. Sea Cucumber

13. http://www.starfish.ch/Fotos/echinoderms

14. http://universe-review.ca/I10-82-starfish.jpg

16. http://www.tolweb.org/Echinodermata

17. • Complete digestive system
(tubular gut), mouth to anus.
(bottom to top)
• Crinoidia: filter-feed, use cilia
• Asteroidea: Cardiac (evert),
pyloric stomach, digestive
glands
• Urchins: “Aristotle’s lantern”
(masticatory apparatus)
• Holothurians:
suspension/deposit feeders,
use tentacles.