prevent back flow of blood

Blood leaves the left ventricle through the aorta

Stops the back flow of blood from the right ventricle to the right atrium

Blood enters the heart (right atrium) through this blood vessel

Divides the heart into left and right to stop oxygenated blood from mixing with deoxygenated

Receives deoxygenated blood from the body

Receives oxygenated blood from the lungs

Stops the back flow of blood from the left ventricle to the left atrium

Stops the back flow of blood when leaving the heart from either right or left ventricle

A chamber of the heart that pumps oxygen rich blood through into the aorta.

A chamber of the heart that pump deoxygenated blood into the pulmonary artery

To carry oxygen around the body

Transport oxygen to the working muscles

See image

Carry blood away from the heart Mostly carry oxygenated blood High blood pressure Thick walls Smaller lumen No valves

Carry blood towards the heart, mostly carry deoxygenated blood, lower blood pressure, thinner walls, larger lumen, has valves

One cell thick, allow effective gas exchange,

Systemic and pulmonary systems

Transports blood between the heart and the lungs.

Transports blood between the heart and the body

number of beats per minute

Amount of blood pumped out of the heart in one contraction

Amount of blood pumped out of the heart in one minute

Force applied against the blood vessel walls. It is needed to pump blood around the body.

Redistribution of blood during exercise. More blood goes to the working muscles, less blood goes to the organs that don't need it.

Blood vessel walls get narrower around the organs that don't need the blood

Blood vessel walls get wider around the working muscles

Tiny sacs that produce enormous surface area and are responsible for gas exchange

first step in respiratory system, takes in air

Lined with rings of cartilage to stop it from collapsing. Leads down to the Bronchi

Trachea divides into two bronchi.

Once the bronchi have entered each lung, they divide into bronchioles to carry air to the alveoli.

Amount of air you breath in or out in one breath

The number of times you breath in a minute

Amount of air you breath in or out in one minute

Intercostal muscles and the diaphragm

Ribs go up and out, Intercostal muscles contract, Diaphragm contracts and flattens, Volume of lungs increases, Decreases air pressure

Ribs go down and in, Intercostal muscles relax, Diaphragm relaxes and becomes domed shaped, Volume of lungs decreases, Increased air pressure

Oxygen as fuel, Carbon dioxide as waste, Low intensity exercise, Continuous activity (3 minutes or more)

Characteristics of anaerobic respiration