Human Biology

http://www.ck12.org Chapter 1. Human Biology

Vocabulary

• aorta: Largest artery; receives blood directly from the heart.


• artery: Blood vessel that carries blood away from the heart toward the lungs or body.


• blood vessel: Tube that transports blood; includes the arteries, veins, and capillaries.


• capillary: Smallest type of blood vessel that connects very small arteries and veins.


• inferior vena cava: Vein that receives blood directly from the heart.


• pulmonary artery: Blood vessel that carries oxygen-poor blood away from the heart to the lungs.


• pulmonary circulation: Part of the circulatory system that carries blood between the heart and lungs.


• superior vena cava: Vein that brings blood back to the heart from the upper body.


• systemic circulation: Part of the circulatory system that carries blood between the heart and body.


• vein: Blood vessel that carries blood toward the heart from the lungs or body.

Summary

• Arteries carry blood away from the heart, while veins return blood to the heart.


• Pulmonary circulation carries blood between the heart and lungs, while systemic circulation carries blood
  between the heart and body.

Practice

Use the resources below to answer the questions that follow.

• Human Circulation: Blood Vesselsat http://www.youtube.com/watch?v=oruunlHsXoQ (3:50)

MEDIA

Click image to the left for more content.

1. What is the difference between capillaries, veins, and arteries?


2. What is endothelium? What vessels have this tissue?


3. What do arteries and veins have that capillaries don’t? How does size relate to this difference?
   
   
   • Blood Vessel Structure and Functionat http://www.youtube.com/watch?v=whtNDBIhczQ (3:16)
   
   
   
   

MEDIA

Click image to the left for more content.

1. How does the structure of arteries differ from the structure of veins?


2. How is the structure of arteries and veins related to their function?