Veins and Arteries (circulatory system)

Graduation Requirements
Biological Laboratory
Field & Cluster
Health Health and Bio Science
Equipment/Materials Needed
No special equipment is needed
veins and arteries
Prerequisites
Description
Viens and arteries are part of the circulatory system and play an instrumental role in health. Veins and arteries are responsible for moving formed and unformed components of the blood to every cell in the body in a closed system, beginning and ending with the heart.


Badge Completion Requirements

Veins and Arteries

Veins and Arteries 

Veins and arteries are responsible for moving blood to every cell in the body in a closed system. A system that begins and ends with the heart.

Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.

Arteries and veins are two of the body’s main type of blood vessels. These vessels are channels that distribute blood to the body. They’re part of two closed systems of tubes that begin and end at the heart. These systems of tubes are either:

  • Pulmonary. The pulmonary vessels are arteries that transport oxygen-poor blood from the heart’s right ventricle to the lungs. Pulmonary veins transport oxygen-rich blood back to the heart’s left atrium.
  • Systemic. The systemic vessels are arteries that carry oxygen-rich blood from the heart’s left ventricle to the tissues in all parts of the body. They then return oxygen-poor blood through the veins back to the heart’s right atrium.

What are the different types of arteries?

There are three types of arteries. Each type is composed of three coats: outer, middle, and inner.

  • Elastic arteries are also called conducting arteries or conduit arteries. They have a thick middle layer so they can stretch in response to each pulse of the heart.
  • Muscular (distributing) arteries are medium-sized. They draw blood from elastic arteries and branch into resistance vessels. These vessels include small arteries and arterioles.
  • Arterioles are the smallest division of arteries that transport blood away from the heart. They direct blood into the capillary networks.

 

 

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What are the different types of veins?

There are four types of veins:

  • Deep veins are located within muscle tissue. They have a corresponding artery nearby.
  • Superficial veins are closer to the skin. They don’t have corresponding arteries.
  • Pulmonary veins transport blood that’s been filled with oxygen by the lungs to the heart. Each lung has two sets of pulmonary veins, a right and left one.
  • Systemic veins are located throughout the body from the legs up to the neck, including the arms and trunk. They transport deoxygenated blood back to the heart.

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