3.6 RESPIRATORY SYSTEM

Challenge

How do I get the salt into the beaker?

Gas Exchange! When oxygen from the environment is

exchanged with carbon dioxide from the body

! 2 requirements! ! a moist, clean membrane ! a structure with a large surface area

Gas Exchange in the Lungs (O2 and CO2)! Occurs in air sacs called alveoli ! Oxygen in lungs moves into capillaries (blood) ! carbon dioxide from the blood into the alveoli

How has bigger lungsMales or females?Athletes or non-athletes?

Athletic female or non-athletic male?

Respiration! Breathing: Muscular action that moves gases in and

out of the lungs

! Respiration: Using O2 gas along with sugar in food to produce energy in the cells mitochondria

Oxygen + sugar (glucose) ! carbon dioxide + water + energy

O2 + C6H12O6 ! CO2 + H2O + Energy

Respiratory System - Structure

Respiratory SystemStructure Function

Nasal cavity Warms , moistens, and cleans the air

Respiratory SystemStructure Function

Pharynx Part of digestive and respiratory system

Larynx Voice box (Adam’s apple) Contains vocal cords

Trachea wind pipe -cleans the air

Respiratory SystemStructure Function

Bronchi Conduct air into each lungs

Bronchioles branches off bronchi sends to alveoli

Respiratory SystemStructure Function

Alveolus (alveoli)

tiny sac for gas exchange exchange

Capillaries surround alveolus (where gases enters the blood)

Respiratory SystemStructure Function

Lung Made up of alveoli, bronchioles and capillaries

Diaphragm Muscle that aids in inhalation and exhalation

Homework! Respiratory CROSSWORD