CardiovascularSystem

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

Which is not a function of the circulatory system?1. Carry nutrients &

oxygen to body cells2. Carry carbon dioxide

& waste away from body cells

3. Attack disease-causing bacteria

4. Produce chemicals that control body processes