Ms. Tomliving Environment

Name ______Date ______

Ms. TomLiving Environment

What is Respiration?

In biology, the word respiration is used in two slightly different ways. At the cellular level, respiration is defined as the release of energy from the breakdown of food molecules in the presence of oxygen. Without oxygen, cells lose their ability to produce ATP. Without ATP, cells cannot do any of the jobs necessary to support life.

The Human Respiratory System is the organ system used to obtain the oxygen needed by cells, and to release the carbon dioxide produced as waste by cells. The exchange, or movement, of oxygen and carbon dioxide in and out of the body is also known as respiration.

With each breath, air enters the body through the mouth and nose, and then fills up the lungs where the movement, or exchange, of gases takes place.

The respiratory system is an organ system. Organ systems are made of 2 or more organs that work together to perform a job. The job of the respiratory system is to bring about the exchange of oxygen and carbon dioxide gas. The organs involved in this organ system are the nose, mouth, trachea, lungs, and diaphragm.

Using Bloom’s Taxonomy, create two questions on the informational text.

Knowledge:

Comprehension:

Cellular Respiration vs. Respiration

Respiration in single cells:

Respiration in organisms:

Once respiration in organisms takes place, CELLULAR RESPIRATION follows in the cells.

• The human respiratory system picks up ______from the air we INHALE and releases ______in the air we exhale

The Human Respiratory System

Label the nose, mouth, pharynx, trachea, lungs, and diaphragm

• Air enters the ______, where it is filtered, warmed, and moistened
• It then passes through the ______(______)
• From the pharynx, air enters the ______(______)
• From the pharynx, food enters the esophagus
• The ______prevents food from entering the trachea
• The trachea is a tube that ______
• Once the trachea reaches the lungs, it splits into two tubes called ______

Humans have two lungs – the left lung is slightly larger than the right lung because the ______is located on the left side

• Inside the lungs, each bronchi splits into many branches called ______
• At the end of the bronchioles are clumps of ______
• Draw and label the alveoli on the diagram
• ______occurs at the alveoli
• The alveoli are directly connected to the ______by ______