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Heart. Blood vessels. Circulatory System or Cardiovascular System. arteries. veins. Functions. Oxygen, nutrients, hormones Carbon dioxide & waste Lungs receive carbon dioxide (exhale) Cell waste carried to kidneys for removal from body. To Cells. From Cells. Cardiac Muscle.

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Circulatory System or Cardiovascular System

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Circulatory system or cardiovascular system

Heart

Blood vessels

Circulatory Systemor Cardiovascular System

arteries

veins


Functions

Functions

  • Oxygen, nutrients, hormones

  • Carbon dioxide & waste

    • Lungs receive carbon dioxide (exhale)

    • Cell waste carried to kidneys for removal from body

To Cells

From Cells


Heart

Cardiac Muscle

Heart

  • Never rests

  • Sends blood to

    • Lungs

    • Rest of body

  • Contains myocardium

    • Special type of muscle


4 heart chambers

4 Heart Chambers

4 Chambers

  • Septum divides into left/right halves

    • 2 chambers in each ½

      • Upper chamber: atrium

      • Lower chamber: ventricle

  • 1 way valves

    • Blood flows in 1 direction

  • How does it beat?

    • Impulses from brain send an electrical impulse

HeartValve


Circulation in the heart

1

3

4

2

Circulation in the Heart

1. Blood with carbon dioxide and waste is carried to heart

See page 390

2. Pumped into lungs

3. Blood picks up oxygen and releases carbon dioxide

4. Oxygenated blood is passed back to the heart

5. Pumped to the body’s tissues through aorta


Blood

Blood

  • Delivers

    • Oxygen, nutrients & hormones

  • Carries away

    • Wastes and carbon dioxide

  • Helps to defend against infection


4 parts of blood

4 Parts of Blood

RBC

1.Plasma (55% of blood)

-Liquid containing nutrients, waste, salts, and proteins

2.Red blood cells (40%)

  • Carry oxygen to tissues

  • Hemoglobin molecule: oxygen carrying part of blood

    • Rich in iron

    • Pigment that makes blood red

Platelets

WBC


Circulatory system or cardiovascular system

3.White blood cells

  • Some kill (surround, invade and ingest) pathogens

  • Some form antibodies for immunity to a 2nd attack

    4.Platelets

  • Prevent the body’s loss of blood: forming blood clots

    • Scab is evidence of a clot


3 types of blood vessels

3 Types of Blood Vessels

Arteries carry oxygenated blood away from heart

Veinscarry deoxygenated blood back to heart

Capillaries“end of the road” connect arteries and veins


How a scab forms

How a scab forms:

  • A wound or cut in the skin leaks blood from the damaged blood vessels.

  • Chemicals released from damaged cells and platelets make dissolved substances in the blood turn into a meshwork of microfibres, of the substance fibrin. This network traps blood cells.

  • Gradually the meshwork hardens into a clump or clot that seals the leak. The clot then hardens and dries further into a protective scab.

  • White cells arrive to attack any germs, and the skin begins to regrow and heal.


Circulatory system or cardiovascular system

Care

  • Don’t smoke

    • Nicotine increases blood pressure & heart rate by narrowing arteries

  • Maintain appropriate weight

  • Exercise (aerobic exercise)

    • At least 20 continuous min 3 x’s a week

    • Strengthens heart, improves circulation

Most problems are

within your control!


Blood pressure

120

80

Blood Pressure

  • The force of blood on arteries

    • Systolic-blood surges through arteries

      • 110-120

    • Diastolic-ventricles relax & refill with blood

      • 70-90


Blood pressure classification

Blood Pressure Classification


Problems

Problems

  • Congenital Heart Disease

    • Congenital: occurring at birth

    • Examples

      • Hole between 2 chambers

      • Valves not functioning properly

      • Blockage of blood flow

    • Treatment: surgery

  • Heart Murmur

    • Abnormal sound

    • Major cause: defective valve

      • Sound: http://www.openheartsurgery.com/heart_sounds.html

        Use the WAV File


Problems1

A Molecule to Breath With

Iron Atom

Problems

3. Anemia

  • Hemoglobin molecule is below normal levels

  • Body cells don’t receive oxygen

  • Common cause: iron deficiency

    • Eat leafy green veggies, dried fruits, supplements


Http en wikipedia org wiki hemoglobin structure

http://en.wikipedia.org/wiki/Hemoglobin#Structure


Circulatory system or cardiovascular system

Problems

4. Heart Attack

  • Blood supply to part of the heart muscle is severely reduced or stopped

    • Normally due to a buildup of plaque within the coronary arteries

  • Treatments

    • Bypass surgery


Circulatory system or cardiovascular system

3.

1.

2.

1. To widen narrowed coronary arteries, a football-shaped burr that rotates up to 200,000 times a minute may be used to cut away plaque from artery walls.

3. A stent is typically used to prevent re-narrowing after an artery is widened.

2. Balloon angioplasty flattens plaques and stretches the artery wall.


Circulatory system or cardiovascular system

Problems

5. Leukemia

  • Cancer of the blood

  • Abnormal production of WBC in bone marrow

    • Cells spill into blood, enter other organs & interfere with functioning

    • Prevent marrow from producing RBC, platelets & normal WBC

  • Treatments

    • Bone marrow transplants

    • Process slowed with:

      • Chemotherapy (chemicals)

      • Radiation


Objectives

Objectives

Functions

  • What does blood carry to body cells?

  • What does blood remove from body cells?

    Structure

  • What are the 3 main blood vessels?

    • Which contains oxygen?

    • Which does not contain oxygen?

    • Which are the smallest?

  • Name the upper and lower chambers of the heart.

  • Name the oxygen-carrying part of the blood.

    Cell: ________________ Molecule: ______________

  • Name the 4 main parts of the blood?

    • What is the largest % of the blood?

    • What do WBC do?

    • What do RBC do?

    • What do platelets do?


Objectives1

Objectives

Care

  • What does nicotine do to your blood pressure?

  • What does nicotine do to your arteries?

  • What is the recommended amount of exercise?

    • _________ continuous minutes, ________ x’s a week.

      4. What is a normal blood pressure reading?

      Problems

  • What does congenital mean?

  • Give one example of congenital heart disease.

  • What is the major cause of a heart murmur?

  • Anemia is lack of what molecule?

    • What is the most common cause of anemia?

    • What foods contain iron?

  • What is the name for cancer of the blood?

    • Name 1 treatment method.


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