CK12 Life Science

Table 18.1: (continued)

System Structure (organs and

tissues)

Function

Figure 18.10: In the spleen, the white pulp makes white blood cells, and the red pulp acts
like a filter that removes dead and dying cells from the blood. ( 16 )

Lesson Summary

• Thecardiovascularsystemconsistsoftheheart, thebloodvessels, andtheblood. There
  are three main types of blood vessels in the body; arteries, veins, and capillaries.


• The systemic circulation is the portion of the cardiovascular system, which carries
  oxygen-rich blood away from the heart, to the body, and returns oxygen-poor blood
  back to the heart. The pulmonary circulation is the part of the cardiovascular system,
  which carries oxygen-poor blood away from the heart to the lungs, and returns oxygen-
  rich blood back to the heart.