Your SlideShare is downloading. ×
0
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
A&P Chapter 25 The Circulatory System
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

A&P Chapter 25 The Circulatory System

6,816

Published on

2 Comments
1 Like
Statistics
Notes
No Downloads
Views
Total Views
6,816
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
381
Comments
2
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. The Circulatory System Body Structure and Function Chapter 25
  • 2. Overview of the Circulatory System
    • The circulatory system consists of the heart, blood, blood vessels and the structures that make up the lymphatic system.
    • The heart is responsible for the blood through the arteries and veins.
    • The blood provides oxygen for the cells and removes carbon dioxide and waste.
  • 3. The Heart
    • The heart is a four-chambered muscular pump lying just left of the midline of the chest.
    • Beneath the sternum.
    • Consists of 3 layers: pericarduim, myocardium and endocardium
  • 4. The Heart
    • The human heart is about the size of a fist and weighs 9 oz.
    • Cone shaped.
    • Chambers on the right side move blood to the lungs.
    • Chambers on the left move blood back to the body.
  • 5.  
  • 6. Blood Flow Through the Heart Right Side (oxygen poor blood)
    • Blood enters the right atrium first. It is the smallest chamber and receives blood from the inferior and superior vena cava.
    • From the right atrium the blood passes through the tricuspid valve into the right ventricle.
    • Blood leaves the right ventricle through the pulmonary valve to the lungs.
  • 7. In the lungs…
    • In the lungs we exhale releasing waste and carbon dioxide.
    • We inhale, enriching the blood with oxygen.
  • 8. Left side of the heart (oxygen rich)
    • On return from the lungs, the blood enters the left atrium through the pulmonary vein.
    • Blood then passes from the atrium to the ventricle through the bicuspid valve.
    • The left ventricle is the strongest chamber, pumping blood throughout the entire body.
    • Blood leaves the heart through the aorta.
  • 9. Valves
    • Valves in the heart act as doorways.
    • Blood flows in one direction.
    • Any damage or disease can allow a backflow of blood.
    • The resulting sound is a heart murmur.
  • 10. Vascular System of the Heart
    • The heart is comprised of dense muscle and requires its own vascular system.
    • Coronary arteries supply the heart with blood.
    • Coronary veins drain the blood into the coronary sinus and back into the right atrium for oxygenation.
  • 11. Myocardial infarction
    • When the coronary vessels are blocked, the heart muscle becomes starved for oxygen.
    • Resulting chest pain is called angina.
    • If oxygen is deprived for a long time , the heart muscle will be damaged and death may result.
  • 12. Heart Facts
    • The heart is able to determine its own rate and rhythm.
    • Regulated by the autonomic nervous system
    • The cardiac cycle is all the events that occur in a heartbeat.
    • Ault rates vary from 70-110 bpm.
    • “ LUB-DUB” is the sound of the valves closing.
  • 13. Blood Vessels
  • 14. Arteries
    • Carry blood away from the heart.
    • Elastic tubes that expand with pressure during contraction of the heart.
    • We can calculate the heart rate by checking the pulse . (Pulse is checked at a site where an artery overlies a bone.)
    • Radial site, brachial, carotid, temporal, femoral, popliteal dorsal pedis ad anterior tibial.
  • 15. Pulse Sites
  • 16. Veins
    • The vessels that transport blood from the peripheral tissues to the heart.
    • Thin walls
    • Valves that force the blood to flow towards the heart.
    • Elastic walls, pressure is lower than in the arteries.
    • More superficial = blood work/phlebotomy sites or IV sites.
  • 17. Capillaries
    • Microscopic blood vessels.
    • Single-celled walls.
    • Exchange of oxygen, carbon dioxide and waste takes place.
  • 18. Veins and Arteries
  • 19. Blood Pressure
    • Measurement of the force applied to the walls of the arteries.
    • The pressure is determined by the force and the amount of blood pumped and by the size and flexibility of the arteries.
    • Changes depending on activity, temperature, diet, emotional state, posture, physical condition and medication use.
  • 20. Blood Pressure
    • Blood pressure is measured systolic(when the left ventricle contracts) over the diastolic pressure (when the pressure in the left ventricle relaxes).
    • Average BP120/80mmHg
  • 21. Pulmonary Circulation versus Systemic Circulation
    • Pulmonary
    • Moves blood from the heart to the lungs and back to the heart again.
    • Allows for oxygenation of the blood and carbon dioxide to leave the body.
    • Systemic
    • Route the blood takes when it leave the heart, travels through the body and then returns to the heart.
    • Function is to delivery oxygen and nutrients to the cells and to pick up carbon dioxide and waste.
  • 22. Blood
    • Blood is composed of red blood cells, white blood cells and plasma.
    • Plasma is about 55% of total volume of whole blood. Helps to maintain fluid volume an control blood pressure.
  • 23. Red Blood Cells
    • Erythrocytes
    • Produced in the red bone marrow
    • Small enough to pass through capillaries
    • Red pigment called hemoglobin
    • Hemoglobin carries oxygen.
    • Low RBC=anemia
  • 24. White Blood Cells
    • Leukocytes
    • Larger, have nucleus and lack hemoglobin
    • Not as many as RBC
    • Fight infection
    • Increased # may indicate infection or disease.
  • 25. Blood Platelets
    • Thrombocytes
    • Control bleeding by forming a clot
  • 26. Functions of blood
  • 27. Case Study
    • What are the signs and symptoms of angina?
    • Why was the patient given nitroglycerin?
    • If no relief from chest pan, what should he do next?

×