Set up Cornell Notes on pg. 55•Topic: 30.1 Respiratory Functions•Essential Question:

1.On pg. 54 make a respiratory system tree map describing the functions of each…•Nose & mouth•Epiglottis•Trachea •Lungs•Bronchi•Bronchioles•Alveoli

2.1 Atoms, Ions, and Molecules

30.1 Respiratory Functions

KEY CONCEPT

The respiratory and circulatory systems bring oxygen and nutrients to the cells.

• Chapter 29 test was out of 20, not 21• “When talking about the endocrine system, negative

feedback inhibition means that an increase in a certain hormone will _________”– decrease the manufacturing of that same hormone

• “Which of the following BEST describes the pathway of an impulse in the reflex action that moves a hand away from a heat source?”– REFLEX ACTION– Sensory neurons in the hand --> interneurons in the spinal

cord --> motor neurons in the hand– Most people picked: “sensory neurons in the hand -->

interneurons in the brain --> motor neurons in the hand

Imagine that you have just been running or exercising strenuously. Please give examples of what happens to your body.

How do you feel?Heart?Lungs?Chest?

30.1 Respiratory and Circulatory Functions

Word Bank:Lungs

Epiglottis

Bronchioles

Nose

Trachea

Alveoli

Diaphragm

Bronchi

Mouth

Practice Test

1.

8.

9.

KEY CONCEPT

The respiratory and circulatory systems bring oxygen and nutrients to the cells.

30.1 Respiratory Functions

nose

sinus

mouth

epiglottis

trachea

lungs

• The respiratory system is where gas exchange occurs.

– What are the gases involved with the respiratory system?

– picks up oxygen from inhaled air – expels carbon dioxide and water

The respiratory system moves gases into and out of the blood.

• It is the only place where gases in the blood are exchanged with gases from the atmosphere

• What happens when areas of the body do not get oxygen?

• What happens when a tourniquet is put on?

• Breathing involves the diaphragm and muscles of the rib cage.

• Air flows from areas of high pressure to low pressure.

Air inhaled.

Muscles contract andrib cage expands.

Diaphragm flattensand moves downward.

Air exhaled.

Muscles andrib cage relax.

Diaphragm relaxesand rises.

• Nose and mouth are entry points• Epiglottis regulates airflow into the

trachea- and keeps food from blocking the airways

• Trachea is the major airway to the lungs

• Lungs are organs that absorb oxygen and exhale carbon dioxide

• Bronchi are bronchioles are airways to the alveoli

• **Alveoli are main sites of gas exchange; absorb oxygen

Functions of the parts of the respiratory system

30.1 Respiratory and Circulatory Functions

nose

epiglottis

trachea

bronchi

bronchioles

diaphragm

alveoli

1.

8.

9. lungs

mouth

bronchiole

alveoli

Bronchi or Bronchus

Draw and label the parts of the lungs on the bottom of pg 55trachea

•Hypothesize…

• Why does your breathing change when you are exercising?

30.2 Respiration and Gas Exchange

• Review your tree map with your table.

bronchi

alveolibronchioles