Question

name date concept: introduction to skeletal systems 1. what are the functions of a skeleton? list at least four. 2. what are the two types of skeletons? describe each and list some examples of the animals that possess each type. type 1: type 2: 3. what are the advantages and disadvantages of an exoskeleton? advantages: disadvantages: 4. what are the advantages and disadvantages of an endoskeleton? advantages: disadvantages:

Explanation:

1. Functions of a skeleton:

• Support: Provides structural support for the body.
• Protection: Protects internal organs (e.g., skull protects the brain).
• Movement: Works with muscles for locomotion.
• Mineral storage: Stores calcium and phosphorus.
• Blood cell production: Red bone marrow produces blood cells.

1. Types of skeletons:

• Exoskeleton:
• Description: External skeleton made of chitin (in arthropods) or calcium carbonate (in some mollusks).
• Examples: Insects (e.g., grasshoppers), crustaceans (e.g., crabs).
• Endoskeleton:
• Description: Internal skeleton made of bone and cartilage.
• Examples: Vertebrates (e.g., humans, dogs, fish).

1. Advantages of exoskeleton:

• Protection against predators and physical damage.
• Prevents water loss (in terrestrial arthropods).
• Provides attachment points for muscles.

Disadvantages of exoskeleton:

• Restricts growth (molting is required).
• Can be heavy (limits size in some cases).

1. Advantages of endoskeleton:

• Grows with the body (no molting needed).
• Lighter than exoskeleton (allows for larger size in some vertebrates).
• Flexible (allows for a wide range of movements).

Disadvantages of endoskeleton:

• Less protection in some cases (compared to exoskeleton in terms of external coverage).
• Susceptible to fractures.

Answer:

1. Support, protection, movement, mineral storage, blood cell production.
2. Type 1: Exoskeleton - external, made of chitin/calcium carbonate; examples: insects, crustaceans. Type 2: Endoskeleton - internal, made of bone/cartilage; examples: vertebrates (humans, dogs, fish).
3. Advantages: protection, prevents water loss, muscle attachment. Disadvantages: restricts growth (molting), can be heavy.
4. Advantages: grows with body, lighter, flexible. Disadvantages: less external protection, susceptible to fractures.