Skeletal System
What is a bone?
A bone is a hard, connective tissue that forms the framework of the human body and provides support and protection for organs.
What is the purpose of tendons?
to join muscles to bones.
What is the brain?
The brain is a part of the nervous system that is responsible for processing information and controlling many of the body's activities.
During physical activity, which organ increases its rate and uses contraction to pump more oxygen/blood to working muscles.
The heart.
Describe the purpose of lungs.
The lungs are the primary site where oxygen enters the blood and carbon dioxide leaves it.
How do joints allow bones to move?
Joints connect two or more bones and allow them to move relative to each other, making movements like bending, straightening, and rotating possible.
How does the quadriceps help you straighten your knee?
The quadriceps contract and pull on the tibia through the patellar tendon causing the knee joint to straighten (extend).
How does the nervous system respond to exercise?
During exercise, the nervous system sends signals from the brain and spinal cord to skeletal muscles, allowing them to contract and produce movement.
What are arteries?
Arteries are blood vessels that carry blood away from the heart.
What is the diaphragm?
This structure contracts and moves downward, helping the lungs expand and allow more air to enter the body.