Cardiovascular System
Cardio = “heart” Vascular = “vessels”
Circulatory (Cardiovascular) System
Made up of heart, vessels, and blood
Three Types of Blood Vessels
Arteries - move blood away from the heart
Three Types of Blood Vessels
Arteries - move blood away from the heart
Veins - move blood toward the heart
Three Types of Blood Vessels
Arteries - move blood away from the heart
Veins - move blood toward the heart Capillaries -
tiny blood vessels that connect arteries and veins
Functions of the Blood
Carries oxygen from lungs to all body cells and removes carbon dioxide from the cells
Red blood cell
White blood cell
Functions of the Blood
Red blood cells – contain hemoglobin which combines with oxygen. These cells deliver oxygen to the body.
Their disc shape helps them squeeze through vessels.
They wear out and are replaced every four months. New red blood cells are produced in the bone marrow.
Red blood cell
Functions of the Blood
Carries waste products of cell activity to the kidneys to be removed from the body
Functions of the Blood
Transports nutrients from the digestive system to body cells
Functions of the Blood
Materials in the blood help fight infection and heal wounds (white blood cells and platelets).
White blood cell: fights foreign invaders
Platelets: help blood form clots
Functions of the Blood
White blood cells – are generally larger than red blood cells. They can move out of your blood through the capillary walls into tissue fluid and lymph.
They then travel around fighting disease. The white blood cells last 13–20 days, after which they are destroyed by the lymphatic system.
White blood cell: fights foreign invaders
Functions of the Blood
Platelets – are irregularly-shaped, colorless bodies that wear out within 5–10 days
Their sticky surface lets them, along with calcium, vitamin K, and fibrinogen, form clots to stop bleeding.
Platelets: help blood form clots
Which two substances does the blood transport away from body
cells? 1. Oxygen &
carbon dioxide2. Carbon dioxide
& waste3. Nutrients &
waste4. Oxygen &
nutrients
What parts of the blood help fight off disease and heal
injuries? 1. White blood
cells & platelets2. Red blood cells
& platelets3. White blood
cells & red blood cells
4. White blood cells & plasma