1. Circulation and Respiration
Supplying Oxygen to the body through the bloodstream

2. Blood Vessels
Blood vessels carry blood from your heart to all of your body parts, and then back again.
Blood vessel walls consist of muscle tissue and connective tissue that enable it to expand and contract as blood flows through it.
Red blood cells inside the vessel carry oxygen to all parts of your body.

3. Circulatory System Cardio-vascular System
Together, the organs of the circulatory system supply nutrients and oxygen to your body
They remove waste products that would be harmful to your health if they were not removed

4. Heart The human heart is the primary organ of the circulatory system
It is a 4-chambered organ
Blood is actually a type of connective tissue that circulates throughout the body carrying nutrients and oxygen

5. Blood Vessels
Arteries – Blood vessels that carry blood away from the heart
This blood can be going to the lungs
Or to the body organs
Veins – Carry blood to the heart
From the lungs
From the body organs
Capillaries –Tiny blood vessels that allow for diffusion of oxygen and nutrients between the arteries and veins

6. Blood Vessels

7. Heart and Blood Flow
pulmonary circuit carries blood between the heart and lungs.
In the lungs the blood picks up oxygen which is used by the body organs
Carbon dioxide is returned to the lungs to be exhaled

8. Systemic Circuit
The Systemic circuit takes the oxygen rich blood TO the body organs and returns the oxygen depleted blood back to the heart
The blood is then brought back to the lungs (by the pulmonary system) to get oxygen

9. Structures of the Heart

10. High Oxygen Heart Structures
Aorta – Carries Oxygenated Blood to the rest of the body
Left Atrium – Oxygen-rich blood enters the left atrium through the pulmonary veins
Blood passes through the atrioventricular valves to the Left ventricle
Left Ventricle- Made of thick cardiac muscle is the pump. This chamber pumps oxygen-rich blood to the body through the aorta

11. Low Oxygen Side of the Heart
Right Atrium – Oxygen-poor blood enters the right atrium from the body organs through the upper and lower vena cava (veins)
Blood passes through the right atrioventricular valves to the right ventricle
Right Ventricle –Blood is sent to the lungs through the pulmonary arteries
pulmonary Arteries carry oxygen-poor blood back to the lungs

12. Blood Pressure
Systolic pressure measures the pressure of the heart when it is pumping blood
Diastolic pressure is the pressure of the heart “at rest” or taking in blood
Normal blood pressure is below 130/85