1. Nutrition.2. The digestive system.3. The respiratory system.4. The excretory system.5. The circulatory system.6. Human circulation.
The function of nutrition is essential to life. Nutrients give our cells all the energy they need. The digestive system, the respiratory system, the circulatory system and the excretory system carry out the function of nutrition.
The digestive system transform food into nutrients. It has two parts: • Digestive tract. • Digestive glands.
The respiratory system is in charge of breathing. Breathing makes two movements: • Inhale air an it goes into to the lungs. • Exhale air sending it of the lungs.
The urinary system. The sweat glands.The urinary system is made up Sweat glands are in the skinof: and they produce sweat.
It transports nutrients and oxygen to our cells. It is made up of: • The heart. • The blood. • The blood vessels.
Blood is a red liquid tissue made up of cells that float in a liquid called plasma. There are different types of blood cells: • Red blood cells. • White blood cells. • Platelets.
The heart uses rhythmic movements to pump the blood around the body. This movements are: • Systole: Movement of contraction. . • Diastole: Movement of relaxation.
The blood vessels are tubes through which blood circulates. There are three types of blood vessels: • Arteries. • Veins. • Capillaries.
Human circulation is closed, the heart septum separates the two halves of the heart. Human circulation is double, the blood follows two routes. • Pulmonary circulation. • Systemic circulation.