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Friendly Bio. Ch 22

Vocabulary Terminology for Chapter 22 in Friendly Biology

Question or TermAnswer or Definition
Circulatory System ‘s function Is to deliver oxygen & glucose to every cell in the body
Capillaries 1. Are the smallest blood vessels 2. Are only 1 cell layer thick 3. Have fenestrations or openings that allow certain substances to pass
Fenestrations Are openings in capillaries that allow certain substances to pass and the size varies based on location where we need them tightly controlled versus the spleen where whole blood cells can freely move in and out.
Arterioles Supply capillaries with arterial blood.
Arteries Supply arterioles with arterial blood.
Aorta Supply arteries with arterial blood and is the largest artery.
Four Chambers Is how the heart is divided.
Atria Are the two chambers that receive blood from outside the heart
Ventricles Are the two chambers that pump blood out of the heart
Right Atrium Receives blood low in oxygen &high in carbon dioxide from the body
When right atrium contracts The blood passes through right AV valve into the right ventricles
When the right ventricle contracts The blood leaves the heart moving to the lungs to get oxygen and offload carbon dioxide
Left Atrium Receives blood from the lungs high in oxygen and low in carbon dioxide
When the left atrium contracts The blood passes through the left AV valve into the left ventricle
When the left ventricle contracts The blood passes through the aortic valve leaving the heart and moving to the body through the largest artery known as the aorta.
AV valves or Atrioventricular valves Consist of flap like structures known as cusps of the valves.
Chordae Tendonae Are tough string like structures that prevent the valves from prolapsing into the atria.
Murmurs Are abnormal sounds of the heart when valves do not close properly and allow some blood to leak in an unintended direction or the valve is too tight otherwise called stenosis.
Trachea Is where air we breathe moves from mouth & nose down to the lungs.
Bronchi Are the smaller branches that form off the trachea.
Bronchioles Are the smaller branches that form off the bronchi.
Alveoli Are the small grape like clusters of air sacs found at the end of each bronchioles
Capillaries Wrap around the alveoli to pick up oxygen & drop off carbon dioxide
Venules Are the smallest veins and receive blood returning from the body cells that is low in oxygen & high in carbon dioxide.
Veins Are larger than the venules and take blood back to the heart and have thin walls and small valves, unlike arteries.
Plasma or serum Is the watery portion of blood.
Erythrocytes Are red blood cells
Leukocytes Are the white blood cells
Red blood cells Are produced in bone marrow & their primary function is to carry oxygen through a special protein known as hemoglobin
Anemia Is a condition of low red blood cells
White blood cells Function as our body’s defense system against invading organisms.
Lymphocytes Are white blood cells which create antibodies or immunoglobulins which work as a weapon for a later attack of invaders
Eosinophils, basophils, & mast cells Work to mediate inflammation in the body
Carbon monoxide Causes problems in our body because it replaces oxygen being carried by hemoglobin within red blood cells.
Created by: CDM2KK
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