Term
| What does the horse circulatory system include? |
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Definition
| It includes the capillaries,veins,venules,arteries, arterioles, and heart. |
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Term
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Definition
| The organ that pumps the blood throughout the large body. |
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Term
| At rest what is a horse's average heart rate? What factors would change this? |
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Definition
| At rest the average horse's heart rate is 35 beats per minute, however this can be increased or decreased through factors such as exercise and age.The heart rate may also be an indicator that a horse has a medical condition. |
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Term
| Where are the 3 primary places that blood is drawn from a horse? |
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Definition
1.) The jugular vein in the neck (the most common)
2.) In the leg
3.) By scraping the buccal, or cheek region inside the horse's mouth. |
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Term
| Describe arteries and their function. |
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Definition
| Arteries are muscular tubes that carry oxygenated blood away from the heart (*Remembering hint: A in arteries is for Away from the heart) and to all parts of the body. Arteries decrease in size as they move away from the heart and begin to branch into arterioles and then very small tubes known as capillaries. |
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Term
| Describe capillaries and their function. |
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Definition
| Capillaries are very small tubes where the exchange of oxygen occurs. Once the oxygen has been given to the different parts of the body the capillaries give way to venules and then veins. |
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Term
| Describe veins and their function. |
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Definition
| Veins carry the de-oxygenated blood back to the lungs to get oxygenated again. Muscle pressure in the legs helps the veins carry the blood back up the body. |
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Term
| When does the horse's body need the most oxygen? |
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Definition
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Term
| Describe the basic order that blood moves through the parts of the circulatory system in a horse. |
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Definition
| First oxygenated blood is pumped from the heart to the arteries. The arteries narrow and branch into arterioles and then capillaries. At the capillaries oxygen is given to parts of the body. After this exchange is done blood travels from the capillaries to the venules and then to the veins where is is brought back up to the lungs with help from the muscle pressure in the legs to be re-oxygenated and then back to the heart to be pumped out again and re-start the cycle. |
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