circulatory system

The Circulatory The Circulatory SystemSystem

The Cold Heart The Cold Heart FactsFacts

- The heart is a muscle

- The heart is a little larger than your clenched fist- Your heart beats about 100,000 times in one day and about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times.

- Give a tennis ball a good, hard squeeze. You're using about the same amount of force your heart uses to pump blood out to the body. Even at rest, the muscles of the heart work hard—twice as hard as the leg muscles of a person sprinting

- The heart pumps about 1 million barrels of blood during an average lifetime—that's enough to fill more than 3 super tankers

The bodily system The bodily system consisting of the consisting of the heart,heart, blood blood vesselsvessels, and , and bloodblood that circulates that circulates blood throughout blood throughout the body, delivers the body, delivers nutrients and nutrients and other essential other essential materials to cells, materials to cells, and removes waste and removes waste products -- products -- Also Also called the called the cardiovascular cardiovascular system.system.

The DefinitionThe Definition

The Circulatory The Circulatory SystemSystem

What it consists of:

What it does:

- Heart- Blood Vessels- Blood

- Circulates blood throughout the body- Delivers nutrients to cells- Removes waste products from cells

AKA the AKA the cardiovascular systemcardiovascular system

The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system. Circulati

onTwo parts

Heart acts as double pump

Blood from the right side pump is dark red and low in oxygen (oxygen-poor)

Travels through pulmonary arteries to lungs where it gets fresh oxygen and becomes bright red

Blood from lungs through pulmonary veins back to the heart's left side pump

Pumped out into the body

3 Kinds of Circulation:

Pulmonary circulationCoronary circulationSystemic circulation

Movement of blood from the heart, to the lungs, and back to the heart again

Pulmonary Circulation

Movement of blood through the tissues of the heart

Coronary Circulation

Supplies nourishment to all of the tissue located throughout the body, except for

the heart and lungs

Systemic Circulation

The The HeartHeart

A hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation.

The Four The Four ChambersChambers OfOf

The HeartThe HeartTakes oxygen-rich blood from the lungs and pumps it into the left ventricle

Pumps the oxygen-rich blood through the aorta which sends it out into the body

Takes the used blood from the body that no longer has oxygen and pumps it into the right ventricle

Pumps the oxygen-less blood into the lungs where it picks up oxygen again

1.

2.

3.

4.

Blood Blood VesselsVessels

- The part of the circulatory system that transports blood throughout the body.

Three Types of Blood Three Types of Blood VesselsVessels

2) Veins: carry blood containing waste products to different organs (kidneys, liver, etc.) and then back to the heart

1) Arteries: carry oxygen-rich blood away from the heart

3) Capillaries: enable the actual exchange of water and chemicals between the blood and the tissues – forexample…diffusion of oxygen within the lungs

Artery

Vein

Capillaries

The The AortaAorta

The largest artery in the body, originating from the left ventricle of the heart and extending down to the abdomen, where it branches off into two smaller arteries. The aorta distributes oxygenated blood to all parts of the body.

BlooBloodd

The fluid that circulates in the heart, arteries, capillaries, and veins of a vertebrate animal carrying nourishment and oxygen to and bringing away waste products from all parts of the body.

The Bloody The Bloody TruthTruthBlood consists of:

- Red blood cells: disk shaped cells that carry oxygen to cells and carbon dioxide out- White blood cells: cells that engulf and digest bacteria and fungi; an important part of the body's defense system

- Plasma: straw-colored liquid component of blood. It is mostly water (93% by volume) and contains dissolved proteins, glucose, clotting factors, mineral ions, hormones and carbon dioxide

- Platelets: are blood cells that help stop bleeding.

6.)The Lymphatic System – a systemof transporting vessels designed to collect fluid & proteins that leak out of the capillaries and return them to theblood stream proper.

***(note – the “fluid collection” system of the body)

Fluid (mostly water) leaks out of the capillaries due to the high

pressure within the blood vessels (arteries & capillaries). That fluid

needs to be recovered and returned to the blood volume or it will

build up in the tissue spaces. Muscle movements and the force

produced by the heart “run” the lymphatic system.

(***note – this is the lymphatic systems connection to the circulatory system)

Blood is the main transport mediumof the body. It “carries” everythingwe need for life from one point in thebody to another. Because of this, bloodis considered the most important factorin maintaining homeostasis.

1.)Blood transports oxygen (O2) from thelungs to the cells of the body.

2.) Blood transports carbon dioxide (CO2) from the cells of the body to the lungs.

3.)Blood transports nutrients from the digestive tract to the cells of the body.

4.)Blood transports waste products fromthe cells of the body to the liver & kidneys.

5.)Blood transports water (H2O) from the digestive tract to the cells of the body.

6.) Blood transports white blood cells & antibodies to fight infection.

7.)Blood transports platelets & fibrin toform clots which begins healing.

8.)Blood transports hormones from theirproduction sites to target siteselsewhere in the body.

9.)Blood transports heat from the muscles of the body to the surfaceof the skin & the lungs.

10.) Blood transports the body’s bufferingsystem which allows the body to resist pH changes.

1. Exercise on a regular basis. Get outside and play. Keep that body moving (walk, jog, run, bike, skate, jump, swim).

2. Eat Healthy. Remember the Food Pyramid and make sure your eating your food from the bottom to top.

3. Don't Smoke! Don't Smoke! Don't Smoke! Don't Smoke! Don't Smoke!

A Healthy Heart is a Happy Heart

http://www.youtube.com/watch?v=DAXa4eR1s0M

Video

HomewoHomeworkrk

Option 1) Write an essay that details a day in the life of a red blood cell as it travels through the circulatory system … where did you go and what happened

Option 2) Draw the circulatory system and point out the three different types of blood vessels, the heart and its chambers, the lungs, and red blood cells.