Skeletal System
This system gives the body its basic shape and supports organs like the brain, heart, and lungs.
What is the skeletal system?
This body system allows movement by contracting and relaxing muscles.
What is the muscular system?
This body system controls and coordinates the body’s activities by sending electrical signals.
What is the nervous system?
This body system uses hormones to regulate growth, metabolism, and reproduction.
What is the endocrine system?
This body system breaks down food into nutrients that the body can absorb and use for energy.
What is the digestive system?
These tough bands of connective tissue attach muscle to bone and allow movement at joints.
What are tendons?
This type of muscle is attached to bones and is under voluntary control.
What is skeletal muscle?
These cells are the basic functional units of the nervous system and transmit nerve impulses.
What are neurons?
This “master gland” controls many other endocrine glands in the body.
What is the pituitary gland?
This organ begins digestion by mechanically breaking down food and mixing it with saliva.
What is the mouth?
This is the longest and strongest bone in the human body, located in the thigh.
What is the femur?
This muscle works automatically and is responsible for pumping blood throughout the body.
What is cardiac muscle?
This part of the brain controls balance, coordination, and fine motor movement.
What is the cerebellum?
This hormone, produced by the pancreas, helps regulate blood sugar by lowering glucose levels.
What is insulin?
This organ produces bile, which helps break down fats.
What is the liver?
This type of joint, found in the shoulder and hip, allows movement in all directions.
What is a ball-and-socket joint?
These muscles line organs such as the stomach and intestines and move materials through the body without conscious control.
What are smooth muscles?
This division of the nervous system controls involuntary actions like heart rate and digestion.
What is the autonomic nervous system?
These glands sit on top of the kidneys and release hormones involved in stress responses, including adrenaline.
What are the adrenal glands?
This muscular tube moves food from the mouth to the stomach using peristalsis.
What is the esophagus?
This tissue inside bones produces red and white blood cells and plays a key role in the immune system.
What is bone marrow?
This process describes how muscle fibers shorten when actin and myosin slide past each other.
What is the sliding filament theory?
This tiny gap between neurons is where neurotransmitters are released to pass along a signal.
What is the synapse?
This type of signaling occurs when hormones travel through the bloodstream to target cells with specific receptors.
What is endocrine signaling?
Most nutrient absorption occurs in this part of the digestive system, which contains villi to increase surface area.
What is the small intestine?