D. Answer the questions. 1. What tissues hold bones together? 2. How do hinge joints work? 3. What kind of joint can move in a complete circle?

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Let's address each of your questions one by one:

1. **What tissues hold bones together?**
   - The tissues that hold bones together are called **ligaments**. Ligaments are strong, fibrous connective tissues that connect one bone to another at a joint, providing stability and support.

2. **How do hinge joints work?**
   - Hinge joints allow for movement in one plane, similar to the way a door opens and closes. They are formed where two bones meet and are shaped to permit flexion and extension. The primary movement at a hinge joint is bending (flexion) and straightening (extension). Examples of hinge joints include the elbow and knee. The structure of the joint includes cartilage that cushions the bones, synovial fluid that lubricates the joint, and ligaments that provide stability.

3. **What kind of joint can move in a complete circle?**
   - The type of joint that can move in a complete circle is called a **ball-and-socket joint**. This joint allows for rotational movement and movement in multiple directions. The rounded end of one bone fits into a cup-like socket of another bone, enabling a wide range of motion. Examples of ball-and-socket joints include the shoulder and hip joints.
1. **What tissues hold bones together?** - Ligaments hold bones together at joints. 2. **How do hinge joints work?** - Hinge joints allow bending and straightening movements, like the elbow and knee. 3. **What kind of joint can move in a complete circle?** - Ball-and-socket joints allow full circular movement, such as the shoulder and hip.

D. Answer the questions.

What tissues hold bones together?

How do hinge joints work?

What kind of joint can move in a complete circle?

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D. Answer the questions. What tissues hold bones together? How do hinge joints work? What kind of joint can move in a complete circle?