Science

Circulatory system

Transports materials needed by cells, remove waste materials from cells

3 main parts of the circulatory system

Heart blood vessels blood

pericardium

Keeps the heart contained in the chest cavity and prevents heart from over expanding

Atrial septum, Mitral/Bicuspid valve, Ventricular Septum, Tricuspid valve

Four chambers of the heart

Right & Left Atria (atrium)

Recieve blood coming into the heart

Right & Left Ventricles

Pumps blood out of the heart

Right atrium

Collects deoxygenated blood from your body

Left atrium

Recieves oxygenated blood from your lungs

Right ventricle

Pumps deoxygenated to the lungs

Left ventricle

Pumps oxygenated blood out of the heart to all parts of the body

Aorta, Pulmonary artery, Inferior vena cava, superior vena cava

Blood vessels

Diastole

Relaxed phase of heart muscle and reason for lab-dub sound

Systole

Contraction of ventricles and the reason for the heartbeat sound or lab-dub sound

Tricuspid valve, Mitral/Bicuspid valve, Aortic valve, Pulmonary valve

The valves

Valves

Protects the heart by preventing backflow of the blood

Tricuspid valve

Between RA & RV

Bicuspid/Mitral valve

Between LA & LV

Pulmonary semilunar valve

Between RV & pulmonary artery

Aortic valve

Between LV & Aorta

Arteries

Carry blood AWAY from the heart

Veins

Carry blood BACK to the heart

Capillaries

Connects the arteries and the vein

Blood

Consists of red blood cell, white blood cell, and platelet

Aorta

Largest blood vessel

vena cava

Largest vein