The kidneys filter waste products and excess substances from the blood, producing urine. They also regulate electrolyte balance and blood pressure.
Red blood cells contain hemoglobin, a protein that binds to oxygen and transports it from the lungs to tissues throughout the body, while also carrying carbon dioxide back to the lungs for exhalation.
Smooth muscle is an involuntary muscle type found in the walls of hollow organs. It helps move substances through the digestive system, blood vessels, and other structures.
The cerebrum, specifically the motor cortex, is responsible for initiating and controlling voluntary movements, as well as cognitive functions like thinking and decision-making.
The circulatory system, consisting of the heart, blood, and blood vessels, ensures the transport of oxygen and nutrients to cells while removing waste products like carbon dioxide.
