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For more information, please see full course syllabus of Life Science
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Lecture Comments (2)

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Post by jacinta Tokley on April 30, 2013

Are sponges hetrotrophic? I'm slightly confused because you said in the slide of "how are sponges different" that they were hetrotrophic but then further down in "how do sponges get oxygen" you say they make their own food re: photosynthetic bacteria. Can you please clarify.

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Post by Adam JONES on December 15, 2011

Sponges release sperm and eggs into the water not air. It's printed the right way but said the wrong way.


Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Objectives 0:07
    • Objectives
  • Characteristics of Sponges 0:22
    • Characteristics of Sponges
  • How are Sponges Different? 2:20
    • Asymmetrical
    • Sessile
    • Hollow Tube
    • Spicules
  • What do Sponges Eat? 4:46
    • What do Sponges Eat?
  • How do Sponges get Oxygen? 5:45
    • How do Sponges get Oxygen?
  • How do Sponges Help other Marine Animals? 6:44
    • Shelter and Food
  • How do Sponges Reproduce? 7:23
    • Sexual and Asexual Reproduction
    • Hermaphrodites
  • Asexual Reproduction 9:28
    • Asexual Reproduction Overview
    • Budding
    • Regeneration
  • Uses for Sponges 10:48
    • Uses for Sponges
  • Example 1: Describe How Sponges Reproduce Sexually 11:17
  • Example 2: What is a Hermaphrodite? 12:11
  • Example 3: Why Do You Think that Occurred and How are They Different from Plants? 12:29
  • Example 4: Name the Sharp, Pointed Protective Structures Shown in this Picture 14:07