RespirationFulfilling Your Energy Needs

Cellular Respiration

• Within humans:• Using oxygen and glucose create ATP• ATP = body’s chemical energy source for many of

your activities• Requires:• Intake of oxygen, glucose• Circulation of oxygen and glucose throughout body• Delivery of oxygen and glucose to mitochondria• Creation of ATP• Removal of metabolic waste after production

What the process needs

• Oxygen• From breathing

• Glucose• From eating• *other energy sources are available, but not as efficient• Example- lactose• Body turns on lactose gene when glucose is not

present

How you get what you need

• Breathing• Diaphragm expands, taking oxygen into lungs• Oxygen diffuses from lungs into blood stream

• Eating• Food taken in, broken down in mouth, stomach• Digested food passes into intestines• Nutrients and water diffuse into blood stream

• Circulation• Blood carries vital ingredients to cells capable of making ATP

The systems involved

• Respiratory• Exchange of gases with environment

• Digestive• Breakdown and absorption of nutrients and water

• Circulatory• Movement of materials throughout the body

Respiratory System

• Organs/tissues include:• Lungs• Trachea• Nose/mouth• Diaphragm

• Heart?

• Main job- maintain proper level of carbon dioxide and oxygen concentration in the blood stream

Digestive System

• Organs/tissues involved:• Mouth• Esophagus• Stomach• Small/large intestine

• Main job- using enzymes and muscles, break food down into molecules small enough that they can diffuse back into blood stream

• Your body can’t do this all itself. What helps?

Circulatory System

• Organs/tissues include:• Heart• Arteries, veins, capillaries

• Main job- pick up materials needed by the body and deliver them to the proper location while also removing waste from the body

Question

• Based on its name, predict what bronchitis is and how it could impact the process of respiration as a whole.