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Questions and Answers
What type of skeleton is a rigid outer shell that holds up an organism's shape?
What is the internal frame to which the organs and soft tissues attach?
What type of animals have an endoskeleton centered around an axial vertebral column?
What is the rigid connective tissue found in the skeletal systems of vertebrates and invertebrates?
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What type of animals lack a vertebral column and have skeletons that vary, including hard-shelled exoskeleton?
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At what age does the human skeleton reach its maximum mass?
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How many bones does the human skeleton have at birth?
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What percentage of the total body weight does the bone mass in the human skeleton make up?
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Which part of the human skeleton is formed by the vertebral column, the rib cage, the skull and other associated bones?
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Which part of the human skeleton is formed by the shoulder girdle, the pelvic girdle and the bones of the upper and lower limbs?
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Study Notes
Types of Skeletons
- Rigid outer shell is known as an exoskeleton, which supports an organism's shape.
- Internal frame to which organs and soft tissues attach is called an endoskeleton.
Animals with Endoskeletons
- Animals like mammals and birds possess an endoskeleton centered around an axial vertebral column.
Composition of Skeletons
- Rigid connective tissue found in vertebrates and invertebrates is made up of bone and cartilage.
Animals without Vertebral Columns
- Invertebrates lack a vertebral column and can have different types of skeletons, including hard-shelled exoskeletons.
Human Skeleton Development
- Human skeleton reaches maximum mass around the age of 30 years.
- At birth, the human skeleton has approximately 270 bones, which fuse to form 206 in adulthood.
Bone Mass and Weight
- Bone mass in the human skeleton accounts for about 15% of total body weight.
Structure of the Human Skeleton
- Axial skeleton consists of the vertebral column, rib cage, skull, and associated bones.
- Appendicular skeleton is formed by the shoulder girdle, pelvic girdle, and bones of the limbs.
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Description
Test your knowledge of animal anatomy with this quiz on different types of skeletons. Learn about exoskeletons, endoskeletons, and hydroskeletons and how they support various organisms' bodies.
