click below
click below
Normal Size Small Size show me how
Science ch 4
Lesson 1
Term | Definition |
---|---|
What is the role of the cardiovascular system | Deliver needed substances to cells, carry wastes away from cells, help regulate body tempature, amd control cells that fight disease |
Cardiovascular system | Heart, blood vessels, and blood |
Deliver Substances | Transports chemical messengers, oxygen from lungs, glucose from digestive system to body cells |
Removes Wastes | Takes wastes from cells. Ex.blood transports carbon dioxide from body cells to your lungs where it is exhausted |
Regulate Body Tempature | Changes ammount of blood flow in skin helps carry heat away of prevents loss |
Fight Disease | Blood contains cells that attack disease-causing microorganisms |
What is the role of the heart | Pumps blood through blood vessels to body |
Heart. | Hollow, muscular organ |
Septum | Tissue that separates the left side of the heart from the right side of the heart |
Atrium | Releases blood that comes into the heart /upper chamber |
Ventricle | Pumps blood out of the heart/ lower chamber |
Pacemaker | Group of cells in right atrium that signals to make the heart contract |
Valve | Flap of tissue that prevents blood from flowing backwards, separates ventricles and large blood vessels |
Arteries | Carry blood away from heart and them flows into the capillaries |
Capillaries | Tiny blood vessels where substances are exchanged between blood and body cells. Blood then enters veins |
Veins | Carry blood back to the heart |
Aorta | Largest artery in body |