Circulatory or Cardiovascular System Function: Delivers nutrients and oxygen to various parts of the body by circulating blood through veins and arteries (like a giant transportation system). Delivering Removing

HEART – the major organ of the circulatory system that pumps blood throughout the body.

The Heart is divided into FOUR Chambers: Right Atrium; Right Ventricle; Left Atrium; Left Ventricle

ARTERIES Arteries carry oxygen-rich blood away from the heart to the cells and tissues (Arteries start with A - takes blood away!!) Aorta – Largest blood vessel in the heart Pulmonary Artery – Carries blood containing carbon dioxide from your heart to your lungs

VEINS Veins return oxygen-depleted blood from the cells back to the heart. (Veins start with V brings blood back to me)

CAPILLARIES Smallest blood vessel; delivers low-oxygen blood to veins. Gases in capillaries flow from areas of high concentration to low concentration.

SYSTEMIC CIRCULATION = Carries oxygenated blood and nutrients away from the heart to the tissues of the body. Waste products and deoxygenated blood returns back to the heart. Blood also passes through the kidneys and liver and gets filtered.

PULMONARY CIRCULATION = Circulation that carries blood to and from the lungs. The veins bring waste-rich blood back to the heart, then to the lung capillaries where the exchange of oxygen and carbon dioxide takes place.

Parts of the Blood Red Blood Cells – Made in bone marrow; carries oxygen, food, and rids body of CO2 and Waste White Blood Cells – Help fight disease and infection by destroying bacteria and germs that enter the body. Made in the lymph nodes

Parts of the Blood Platelets – Help blood to clot, to prevent excess bleeding. Plasma – Water portion of the blood; 55% of blood is plasma

How Blood Moves Through the Heart

CIRCULATORY SYSTEM & OTHER SYSTEMS The circulatory system works with the respiratory system and digestive system to supply oxygen and nutrients to the body. Blood carries the messenger chemicals - hormones, secreted by the organs of the endocrine system. Thus, the circulatory system is also responsible for circulating hormones for proper communication between the body organs.

RESPIRATORY SYSTEM Function: supplies the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respiratory system does this through breathing. When we breathe, we inhale oxygen and exhale carbon dioxide.

PARTS OF THE RESPIRATORY SYSTEM Nose and mouth wets and warms the air. Air then travels through your voice box and down your windpipe where it splits into two bronchial tubes. A thin flap of tissue (epiglottis) that covers your windpipe when you swallow and prevents food or drink from entering your lungs.

LUNGS The air that comes into the body through the lungs contains oxygen and other gases. In the lungs, the oxygen is moved into the bloodstream and carried through the body. At each cell in the body, the oxygen cells are exchanged for waste gas called carbon dioxide.

CILIA, SALIVA, AND NOSE HAIRS Except for the mouth and some parts of the nose, all of the airways have special hairs called cilia that are coated with sticky mucus. The cilia trap germs and other foreign particles that enter your airways when you breathe in air. From there, they’re swallowed, coughed, or sneezed out of the body. Nose hairs and mouth saliva also trap particles and protect the body.

BRONCHIOLES & ALVEOLI Within the lungs, your bronchi branch into thousands of smaller, thinner tubes called bronchioles. These tubes end in bunches of tiny round air sacs called alveoli which are covered in capillaries. The capillaries connect to a network of arteries and veins that move blood through your body.

DIAPHRAGM The muscle that helps the lungs breath is called the diaphragm.