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Questions and Answers
What is the term for a rigid outer shell that holds up an organism's shape?
What is the term for a rigid outer shell that holds up an organism's shape?
- Hydroskeleton
- Cartilage
- Exoskeleton (correct)
- Endoskeleton
What type of skeleton do vertebrates typically have?
What type of skeleton do vertebrates typically have?
- Endoskeleton (correct)
- Exoskeleton
- Hydroskeleton
- Cartilaginous skeleton
What is the term for a flexible internal structure supported by the hydrostatic pressure of body fluids?
What is the term for a flexible internal structure supported by the hydrostatic pressure of body fluids?
- Exoskeleton
- Hydroskeleton (correct)
- Ossicles
- Endoskeleton
What is the Ancient Greek origin of the term 'skeleton'?
What is the Ancient Greek origin of the term 'skeleton'?
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What are spicules found in the skeletal systems of some animals?
What are spicules found in the skeletal systems of some animals?
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Study Notes
Skeletons and Their Structures
- A rigid outer shell that maintains an organism's shape is known as an exoskeleton.
- Vertebrates generally possess an endoskeleton, which provides internal support and structure.
Fluid-Based Support Structures
- A flexible internal structure that relies on the hydrostatic pressure of body fluids is called a hydrostatic skeleton.
Etymology of 'Skeleton'
- The term 'skeleton' has its roots in Ancient Greek, originating from the word 'skeletos', which means "dried up" or "the dried body".
Components of Animal Skeletal Systems
- Spicules are small, needle-like structures found in the skeletal systems of some animals, contributing to structural integrity and support.
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