Wednesday 5/13/15

Pick up a red & blue pencil. Get out your Human Body Book &

clear your desk.

To carry nutrients and oxygen to and remove waste from

the cells of the body.

The Function

What makes up the circulatory system?

1. Heart

2. Blood

3. Blood vessels

There are 3 types of blood vessels:

1. ARTERY

2. VEIN

3. CAPILLARY

The Heart

ARTERIES - carry blood

away from the heart

VEINS – bring blood

toward the heart

The HeartAorta

Basic Heart

RA LA

RV LV

4 chambers:

- 2 atria (A)

- 2 ventricles (V)

Aorta

Superior Vena Cava

Inferior Vena Cava

Descending Aorta

R Atrium

R Pulmonary Veins

R Pulmonary

Artery

R Ventricle

L Pulmonary Artery

L Pulmonary Veins

L Ventricle

LUNGS

LUNGS

L Atriu

m

RA

RV LV

LA

XX

X

Function of the Immune System

• To defend the body from foreign pathogens

•Defenders are: WBC’s (White Blood Cells) & Lymph

Nodes

Function of Respiratory System

• Respiration means breathing bringing in O2 and releasing CO2

Steps in Breathing

• 1st Step Take in air through the nose or mouth.

Steps in Breathing

• 2nd Step Air flows into pharynx, passes epiglottis, and moves through larynx.

When you swallow food, the epiglottis covers the entrance to the trachea, which prevents food from getting into the air pathways.

Steps in Breathing

• 3rd Step Air travels into the windpipe, or trachea.

Steps in Breathing

• 4th Step Trachea splits into two pipes called the bronchi, which lead into the lungs.

Steps in Breathing

• 5th Step Air sacs in the lungs called alveoli, where gas exchange occurs.

Diaphragm

Larynx (voice box)Trachea

Pharynx

Lung

Bronchii

Take in Air

Bronchioles

How do you breathe?

INHALEEXHALE