Chapter 37.2 – The Circulatory System

The Heart and Blood

Function

Provides the force to distribute ____blood____ to and from the cells

Organs of the Circulatory System Heart – main organ of the

circulatory system Functions in pumping the blood

to and from the lungs for gas exchange

Covered by pericardium – thin TOUGH__ membrane

Muscular organ that contracts to force blood through the vessels

____atria – receive blood from body or lungs (top of heart)

--____ventricles – send blood to body or lungs (bottom of heart

Blood – Blood – carries food and oxygen to the cells carries food and oxygen to the cells and removes the wastes from cellsand removes the wastes from cells

– Solid part of blood:Solid part of blood: Red blood cellsRed blood cells (__RBC__) – (__RBC__) –

carry oxygen from the carry oxygen from the lungs and carry carbon lungs and carry carbon dioxide to the lungsdioxide to the lungs

White blood cellsWhite blood cells (__WBC__) (__WBC__) – destroy bacteria and help – destroy bacteria and help repair tissuerepair tissue

– Liquid part of blood:Liquid part of blood: Plasma – made up of Plasma – made up of

proteins and dissolved salts proteins and dissolved salts in waterin water

Blood Vessels – channels that blood passes through

___ARTERIES_ – carry oxygenated blood away from the heart

____VEINS___ – carry deoxygenated blood to the heart

CAPILLARIES – connect the arteries and vein

Aorta

Pulmonary veins

Right Atrium

Right Ventricle

Pulmonary veins

Left Atrium

Left Ventricle

Chapter 37.1 – The Respiratory System

How We Breathe!

Respiration

Provides our cells with __OXYGEN____and rids our cells of carbon dioxide.

Pathway of Air Nose or mouth pharynx or

throat larynx trachea bronchi bronchioles lungs with alveoli

Alveoli – the place of gas exchange thousands of thin-walled sacs where oxygen and carbon dioxide are exchanged by __diffusion____ with the _circulatory_system

Nose

Larynx

Mouth

Lung

Right Bronchi

Diaphragm

Pharynx

Trachea

Left Bronchi

Bronchioles

Alveoli