Topic Circulatory System Aim Describe the structure and

Topic: Circulatory System Aim: Describe the structure and function of the 3 types of blood vessels. Do Now: Take out your reading notes. Complete Digestive System Check Sheet HW: Finish the Heart ISA

A Platelets Red blood cells B White blood cells C C

Did you know… • The body of an adult contains over 60, 000 miles of blood vessels! • An adult's heart pumps nearly 4000 gallons of blood each day!

http: //www. youtube. com/watch? v=A-Hf. DPJ 3 R 00

Capillaries Arteries Veins

ARTERIES • Carry blood AWAY from heart • Have THICKER walls

• Blood flows FASTER • HIGH pressure

• PULSE can be felt

Branching arteries in the eye

• Most carry blood WITH oxygen

Pulmonary arteries: • Carry DEOXYGENATED blood to the LUNGS

Coronary arteries: • Carry OXYGENATED blood to the myocardium (heart muscle)

Aorta: • Largest artery Carries OXY blood to the rest of the body

Capillaries Arteries Veins

VEINS • Carry blood TO the heart

VEINS • Have THINNER walls • LESS pressure • No PULSE can be felt

• Have VALVES to stop blood from flowing backwards

• Most carry blood WITHOUT oxygen

Pulmonary veins: • Carry OXYGENATED from the LUNGS back to the heart

Superior Vena Cava: • Veins that transports DEOXYGENTATED blood from the upper part of the body back to the heart

Inferior Vena Cava: • Veins that transports DEOXYGENTATED blood from the lower part of the body back to the heart

Coronary veins: • Carry DEOXYGENATED blood from the myocardium (heart muscle) to the vena cava

Artery Vein

Capillaries Arteries Veins

CAPILLARIES • TINY blood vessels • CONNECT arteries to veins

• Walls are very THIN • Walls are one ONE CELL thick

• OXYGEN and NUTRIENTS need to be able to get OUT OF the blood

• CARBON DIOXIDE and other WASTE PRODUCTS move from the BODY CELLS back into the BLOOD https: //www. youtube. com/watch? v=Q 530 H 1 Wxt. Ow

ARTERIES CAPILLARIES VEINS

Blood vessels in the right arm and shoulder

Arteries of the lower leg & blood supply to the face & skull

What would happen if the coronary artery that transports oxygenated blood to the heart gets blocked?

What would happen if the artery that transports oxygenated blood to the brain gets blocked?

Let’s summarize… 1. Identify the three types of blood vessels. 2. Why are arteries very muscular? 3. Identify where each type of blood vessel carries blood. 4. Why are capillaries so thin? 5. Why do veins have valves? 6. In which blood vessel is your pulse felt? Explain why. https: //www. youtube. com/watch? v=oiqf. NHC 0 l. G 0

Review: Identify the type of blood vessel. 1. Low blood pressure VEINS 2. Where diffusion or exchange of substances occurs. CAPILLARIES 3. Contains valves VEINS 4. Carry blood away from the heart ARTIERIES 5. Connects arteries and veins CAPILLARIES 6. Carry blood away from the heart ARTERIES 7. Red blood cells move in single file CAPILLARIES 8. Elastic and flexible. ARTERIES 9. Used to feel pulse. ARTERIES https: //www. youtube. com/watch? v=VVJJHw_Ocp 4