Summary
SUPPORT AND MOVEMENT IN ANIMALS summary- Grade 11 ieb
- Course
- Institution
- Book
Summary with Detailed diagrams
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
Grade 11 Life sciences - Life Sciences (Biology)
-
Grade 11 Life sciences - Life Sciences (Biology)
-
Grade 11 Life Sciences - Life Sciences (Biology)
Seller
Follow
natrox
Reviews received
Content preview
Different types of skeletonsHydrostatic Skeleton
- Fluid-filled cavity surrounded by muscles
- The fluid provides support against which the muscles contract
- The fluid exerts pressure that causes contractions of muscles that change shape and create
movement
Advantages
o Don’t need specialized support because the water they live in provides support
Disadvantages
o Cant move fast
o Only found in water
o Limits size of animal
o No protection
Exoskeleton
- Skeleton occurs on the outside
- Consists of chitin (polysaccharide), which hardens with calcium carbonate
Advantages
o Supports/protects underlying tissues/organs
o Provides place of attachment for muscles making quick movements possible
o Joints are thin and flexible for movement
o Prevents desiccation (drying out)
Disadvantages
o Larger and heavier the exoskeleton which limits the movement
o Limits growth (Chitin can’t expand and animals must shed to grow)
o Impermeable to gases and special respiratory organs are required
Endoskeleton
- Skeleton inside body
- Consist of mainly bone and cartilage
Advantages
o Grow large (bone/cartilage grow with the animal)
o Protects internal organs
o Structural support and shape
o Place of attachment for muscles makes movement possible
o Joints aid flexibility which makes movement efficient
Disadvantages
o Vulnerable to drying out
, Human skeleton
Functions of the skeleton
- Movement
- Protection
- Support
- Mineral storage
- Hearing
- Blood cell formation
Structure of the skeleton
Consists of 206 bone and can be divided into two main sections:
o Axial skeleton
o Appendicular skeleton
Axial Skeleton
Forms the central axis that keeps the body upright. All other parts of the skeleton are attached and it
protects the brain, sense organs, spinal chord and lungs.
Consists of:
→ Skull
→ Vertebral column
→ Rib cage
The benefits of buying summaries with Stuvia:
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
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
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 natrox. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.05. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53340 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now