Lesson 12: Blood flow Objective: - Heart’s and body’s blood supply - Components of blood.
-
Upload
phyllis-blair -
Category
Documents
-
view
214 -
download
0
Transcript of Lesson 12: Blood flow Objective: - Heart’s and body’s blood supply - Components of blood.
Lesson 12: Blood flowLesson 12: Blood flowObjective:-Heart’s and body’s blood supply-Components of blood
http://www.britannica.com/EBchecked/topic/95628/human-cardiovascular-system/33561/Blood-supply-to-the-heart
Coronary Blood supplyCoronary Blood supplyThere are two main coronary arteries: the
left main coronary artery and the right coronary artery which come from the aorta.
The left main coronary artery divides into the left anterior descending branch and the left circumflex arteries.
Each artery supplies blood to different parts of the heart muscle and the electrical system.
BloodBloodPlasma: Pale liquid that carries all the
other parts of the blood, nutrients, CO2, urea, hormones and antibodies
White blood cells: Defends against disease, make antibodies and antitoxins
Platelets: Have no nucleus, help clot bleeding
Red Blood Cells: Carry Oxygen and iron. They have no nucleus
Parts of the Circulatory Parts of the Circulatory SystemSystem
Arteries: - carry oxygenated blood away from the
heart- Leaves the heart at high pressure, so
the walls are thick, strong and elastic- Narrower “lumen” or canal- EXCEPTION: pulmonary arteryCapillaries:- Are very small, one cell thick - Diffuse food and oxygen to body tissues- Take CO2 and urea away from body
tissues
Veins- Take blood back to heart- Blood has lower pressure so the
walls are thinner- Larger “lumen” or tube to carry the
blood- Have valves to keep the blood
flowing in the right direction- EXCEPTION: pulmonary vein
MicroscopesMicroscopes
Start at one of the microscopes. Observe the slide, write down the stations’ number and what you are observing. After 2 minutes rotate clockwise until you have seen all of the slides.
HomeworkHomework
Crossword and question sheet