100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Animal diversity Unit 1.5 notes CA$9.91
Add to cart
Quickly navigate to
Preview
  2.  
  3. Dalhousie University (Dal )
  4.  
  5. Biology
  6.  
  7. BIOL2003 (BIOL2003)

Class notes

Animal diversity Unit 1.5 notes
 9 views  0 purchase

Dalhousie animal diversity notes from the academic school year. Clear and straight forward notes that are easy to understand. All information is on Unit 1.5

Preview 2 out of 10  pages

Document information

  • July 28, 2023
  • 10
  • 2021/2022
  • Class notes
  • Laura gibson
  • Unit 1.5

Subjects

Written for

All documents for this subject (4)

Seller

avatar-seller
nkohoot

Content preview

Lecture 6
Ctenophora
- Comb jellies
- 8 Ctenes (comb rows of cilia)
- ~150 species
- Biradial symmetry
- Colloblast cells (sticky)

Ctenes
- Swim from beating cilia mouth-forward
- Statocyst
- Helps with balance and orientation
- Contains sensory vesicles
- Nerve net similar to Cnidarians

Body forms + Reproduction
- Primarily free swimming but do have creeping and sessile forms
- Usually found at the surface
- Monoecious (gametes shed into water)
- Some undergo internal fertilization

Colour?
- Mostly colourless and transparent (deep sea species red)
- Luminescence (blue + green)
- Refraction

Bilateria
- Triploblastic
- Three embryonic germ layers
- Ectoderm, endoderm and mesoderm
- Body cavities
- Acoelomate
- Pseudocoelomate
- Eucoelomate
- Cephalization
- Anterior and posterior end
- Mouth in head region
- Development of sense organs at anterior end to sense environment
- Being bilateral leads to movement in one direction

, Lecture 7
Xenacoelomorpha (Phylum)
● Xenoturbellids and Acoelomorpha
● Triploblasts (basal)
● Mainly parasitic
● Body shapes
○ Acoelomate (no body cavity)
○ Bilateral
○ Vermiform (worm-like structure)
● No anus
● Flame cells (excretion and osmoregulation)
● Reproduction
○ Well developed
○ Most hermaphrodites (male and female organs)
● Four classes
○ Phylogeny under debate

Platyhelminthes
● Acoelomate body (Parenchyma distinctive from connecting and supporting
tissue)
● Dorso-ventrally flattened
● Triploblasts (protosome - lophotrochozoa)
● Flame cells
○ Filters fluids
○ Removes waste
○ Controls osmotic pressure
○ Flame cells + tube cell = Protonephridia

Turbellaria
● Small or large
● Swim with muscles, cilia and slime
● Skin and muscle
○ Ciliated epidermis
○ Epidermis contains Rhabdites (rod-shaped secretory products)
○ Attach and detach system
■ Dual Gland adhesive organs
● Feeding
○ Muscular Phyarynx in ventral centre of body

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller nkohoot. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$9.91. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

56326 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
CA$9.91
  • (0)
Add to cart
Added