Biology — Structure and Function

Joints and antagonistic musclesSign up

Identify ball-and-socket and hinge joints, and explain how antagonistic muscles move the bones at a hinge joint.

Blood and the respiratory systemSign up

Describe the components of blood and their functions (limited to red blood cells transporting oxygen, white blood cells protecting against pathogens and plasma transporting blood cells, nutrients and carbon dioxide). · Describe how the structure of the human respiratory system is related to its function of gas exchange (in terms of lung structure and the action of the diaphragm and intercostal muscles) and understand the difference between breathing and respiration. · Describe the diffusion of oxygen and carbon dioxide between blood and the air in the lungs.