What is the main purpose of the circulatory system?
The circulatory system moves blood, nutrients, oxygen, carbon dioxide, and hormones throughout our bodies. The heart pumps the blood, while the veins and arteries carry it to the rest of the body. The circulatory system helps every part of our body stay healthy and strong!
Our Circulatory System
Circulation: The movement of blood through the heart and blood vessels to carry oxygen and nutrients to tissues and organs in the body. Heart: The organ that pumps blood throughout the body. Blood Vessels: The tubes that carry blood throughout the body, such as arteries, veins, and capillaries.
What are the different organs in the circulatory system?
What is the respiratory system?
The respiratory system brings fresh air filled with oxygen through your nose and mouth, down your windpipe, and into your lungs. The lungs let the fresh air into your body and collect the used-up air and push it out of the body when you breathe out. Practice inhaling (breathing in) and exhaling (breathing out).
The Respiratory System
Most vertebrate animals (animals with spines) have two lungs. Your left and right lungs aren't exactly the same. ... The highest recorded "sneeze speed" is 165 km per hour. The capillaries in the lungs would extend 1,600 kilometers if placed end to end. We lose half a liter of water a day through breathing.