Movement of bones in the skeletal system is made easier because of the existence of connections between bones called. JOINT

Organs arranged in such a way that together they can perform a more complex function than can any one organ alone are called. SYSTEMS

The pituitary, pineal, thyroid, and parathyroid glands are components of the system. Endocrine

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To obtain the answers to these questions, you can use a variety of resources, such as textbooks, online articles, or educational websites. These resources can provide detailed explanations about the skeletal system, organ systems, and the components of the endocrine system.

For the question about the movement of bones in the skeletal system, you can refer to anatomy textbooks or search for articles related to the skeletal system. These resources will explain that joints are the connections between bones that allow movement. They typically consist of different types, such as hinge joints, ball-and-socket joints, or pivot joints, which allow for specific movements like bending, rotating, or sliding.

To understand the concept of organ systems and how they work together, you can consult biology textbooks or search for articles on the topic. They will describe how organs within an organ system work cooperatively to perform complex functions that would be difficult or impossible for a single organ to accomplish alone. Examples of organ systems include the cardiovascular system, nervous system, or digestive system.

Lastly, for the question regarding the components of the endocrine system, you can again consult biology textbooks or conduct an online search focused on the endocrine system. You will find information explaining that the pituitary gland, pineal gland, thyroid gland, and parathyroid glands are all part of the endocrine system. These glands release hormones into the bloodstream, which regulate various functions in the body, such as growth, metabolism, sleep, and calcium balance.