Final answer:
In biology, 'joins' typically refer to joints, which connect bones and can be classified into three types by their range of motion: synarthroses, amphiarthroses, and diarthroses.
Step-by-step explanation:
When discussing the types of joins in the context of Biology, it is typically in reference to connections between bones, known as joints. Joints can be classified by their range of motion, into three main categories: synarthroses (immovable joints), amphiarthroses (slightly movable joints), and diarthroses (freely movable joints).
Synarthroses are found where movement between bones should be prevented, like in the skull. Amphiarthroses allow for limited movement and are found in joints like the vertebrae. Diarthroses, or synovial joints, offer a wide range of movements and are the most common type of joints found in the limbs.
The study of joins is an essential aspect of anatomy and helps in understanding how different parts of the skeleton interact to allow for movement and support the body structure.