Circulatory system 7.L.3B.2 Construct explanations for how systems in the human body (including circulatory, respiratory, digestive, excretory, nervous, and musculoskeletal systems) work together to support the essential life functions of the body.

Main function The main function of the circulatory system is to transport blood to all parts of the body so that gases, nutrients, and waste products are transported to and from the cells

3 major parts of the circulatory system Blood Vessels - routes blood travels Heart – pumps or pushes blood through body Blood – carries important “ *stuff ” through body Stuff includes oxygen, food, and waste

Blood vessels Blood Vessels resemble very long and skinny tunnels that are all through your body. 3 types: Arteries Capillaries Veins

Arteries Carry blood Away from the heart Carries blood that has oxygen & nutrients to all parts of the body

Move waste products from parts of the body back to the heart & lungs Veins Move waste products from parts of the body back to the heart & lungs

Capillaries Connecting arteries & veins Oxygen & nutrients leave blood to go into cells Carbon dioxide & waste products enter blood from cells exchange

The heart 4 chambers ( or compartments ) 2 upper chambers : Left Atrium Right Atrium 2 lower chambers : Left Ventricle Right Ventricle

Blood 4 parts Plasma- liquid part of blood Red blood cells- carry oxygen to all parts of the body White blood cells- fight and kill germs that may enter your system Platelets- form scabs when you cut yourself, helps stop bleeding