 To carry nutrients and oxygen to and remove waste from the cells of the body. The Function

What makes up the circulatory system? 1. Heart 2. Blood 3. Blood vessels

blood vessels Blood travels from the heart to the body through blood vessels.

There are 3 types of blood vessels: 1. ARTERY 2. VEIN 3. CAPILLARY

What is in the… red blood cells white blood cells platelets plasma carbon dioxide digested food waste (urea) hormones oxygen

The Blood plasma red blood cell white blood cell platelets

Red Blood Cells hemoglobin - contain hemoglobin, a molecule specially designed to hold oxygen and carry it to cells that need it. change shape - can change shape to an amazing extent, without breaking, as it squeezes single file through the capillaries. without a nucleus - a biconcave disc that is round and flat without a nucleus

White Blood Cells There are many different types and all contain a big nucleus. The two main types are the lymphocytes and the macrophages. Some lymphocytes fight disease by making antibodies to destroy invaders by dissolving them.  other lymphocytes make antitoxins to break down poisons. Macrophages ‘eat’ and digest micro- organisms.

Plasma A yellow-colored liquid that carries the cells and the platelets which help blood clot. carbon dioxide glucose amino acids proteins minerals vitamins hormones waste materials like urea. It also contains useful things like:

Platelets Platelets are bits of cell broken off larger cells. Platelets produce tiny fibrinogen fibers to form a net. This net traps other blood cells to form a blood clot.

The Heart ARTERIES carry blood away from the heart ARTERIES - carry blood away from the heart Now let’s look inside the HEART… VEINS– bring blood toward the heart VEINS – bring blood toward the heart

The Heart Aorta

Basic Heart RALA RVLV 4 chambers: atria (A) - 2 atria (A) ventricles (V) - 2 ventricles (V)

How does the Heart work? (9 steps) STEP ONE  Deoxygenated blood from body travels through VENA CAVA to the heart Vena Cava is the largest vein in the body.

blood from the body The heartbeat begins when the heart muscles relax and blood flows into the atria. Both atria fill with blood at the same time. STEP TWO  Right Atrium Blue Red Remember: Blue  NO oxygen Red  has oxygen

The atria then contract and the valves open to allow blood into the ventricles. Both ventricles fill with blood at the same time. STEP THREE  Right Ventricle

The valves close to stop blood flowing backwards. The ventricles contract forcing the blood to leave the heart and go to the lungs. At the same time, the atria relax and fill with blood. STEP FOUR  Lungs

STEP FIVE  Blood picks up oxygen Gas exchange occurs in the lungs where blood picks up oxygen.

blood from the body blood from the lungs The heart beat begins when the heart muscles relax and blood flows into the atria. Both atria fill with blood at the same time. STEP SIX  Left Atrium Blood now has OXYGEN Blue Red Remember: Blue  NO oxygen Red  has oxygen

The left ventricle is the strongest chamber in the heart because it has to pump blood to the whole body. STEP SEVEN  Left Ventricle

STEP EIGHT  Oxygenated blood travels from heart through AORTA Aorta transports oxygenated blood to all parts of the body. Aorta is the largest artery in the body.

STEP NINE  Blood travels through body to organs and drops off oxygen.

Lungs Body cells Our circulatory system is a double circulatory system. This means it has two parts parts. the right side of the system deals with deoxygenated blood. the left side of the system deals with oxygenated blood.

Aorta Superior Vena Cava Tricuspid Valve Inferior Vena Cava Mitral Valve Descending Aorta Aortic Valve R AtriumR Pulmonary Veins R Pulmonary Artery R VentricleL Pulmonary Artery L Pulmonary Veins L AtriumL Ventricle

Tuesday 4/23/13 Which type of muscle would be found in the large intestines? How do you know? Pick up a red & blue colored pencil or marker

Aorta Superior Vena Cava Tricuspid Valve Inferior Vena Cava Mitral Valve Descending Aorta Aortic Valve R AtriumR Pulmonary Veins R Pulmonary Artery R VentricleL Pulmonary Artery L Pulmonary Veins L AtriumL Ventricle