The Skeletal System
This function of the skeleton involves producing red blood cells in the bone marrow, especially during childhood.
What is blood cell production?
These muscles are voluntary, striated, and attach to bones via tendons.
What are skeletal muscles?
This movement decreases the angle at a joint.
What is flexion?
These vessels carry blood away from the heart.
What are arteries?
This somatotype is tall, thin, and suited to endurance events.
What is an ectomorph?
These bones are longer than they are wide and help support body weight and movement.
What are long bones?
This muscle type is involuntary, non‑striated, and found in organs like the stomach.
What is smooth muscle?
Abduction and adduction occur in this anatomical plane.
What is the frontal plane?
This chamber receives deoxygenated blood from the body
What is the right atrium?
This somatotype has broad shoulders, muscular limbs, and excels in power sports.
What is a mesomorph?
This section of the skeleton includes the skull, vertebral column, and rib cage.
What is the axial skeleton?
These muscles contract continuously to help maintain posture.
What are skeletal muscles?
A figure skater spinning rotates around this axis.
What is the longitudinal axis?
These tiny vessels allow oxygen to diffuse into tissues.
What are capillaries?
7‑1‑1 somatotype score represents this extreme body type.
What is an extreme endomorph?
These connective tissues attach bone to bone and stabilise joints.
What are ligaments?
This posterior upper‑back muscle assists with shoulder elevation and rotation.
What is the trapezius?
This movement occurs when a body part turns on its axis.
What is rotation?
During maximal exercise, this percentage of cardiac output goes to the muscles.
What is 80–90%?
This somatotype tends to carry extra fat and suits weight‑bearing activities.
What is an endomorph?
This type of bone has complex shapes and protects structures like the spinal cord.
What are irregular bones?
These muscle fibers are red, fatigue‑resistant, and suited to endurance.
What are slow‑twitch fibers?
Walking, squatting, and kicking occur in this plane.
What is the sagittal plane?
This circulation loop carries blood from the heart to the lungs and back
What is pulmonary circulation?
Athletes typically show higher levels of these two somatotype components.
What are mesomorph and ectomorph characteristics?