Levels of Organization
This is the smallest level of organization in a multicellular organism.
What is a cell?
This organ pumps blood throughout the body.
What is the heart?
This tiny structure in the lungs is where oxygen enters the blood.
What are alveoli?
The skeletal system provides this to the body.
What is support (or structure)?
When blood vessels widen to cool the body, this system is primarily involved.
What is the circulatory system?
A structure made of different tissues working together to perform a specific function.
What is an organ?
These blood vessels carry blood away from the heart.
What are arteries?
Put these in order: bronchi, alveoli, trachea, bronchioles.
What is trachea → bronchi → bronchioles → alveoli?
This type of muscle movement is under your control, like raising your hand.
What is voluntary movement?
These two systems work together to deliver oxygen to muscles.
What are the respiratory and circulatory systems?
Put these in order from smallest to largest: Circulatory System, Red Blood Cell, Human, Blood, Artery
What is red blood cell → tissue → artery→ circulatory system → human?
Name two major functions of the circulatory system.
What are transporting oxygen/nutrients and removing carbon dioxide/waste?
This muscle moves downward to allow air into the lungs.
What is the diaphragm?
Name three functions of the skeletal system.
What are support, protection, blood cell production, mineral storage, and movement? (Any three)
When body movement increases, breathing and heart rate both increase. Why?
To supply muscles with more oxygen and remove carbon dioxide?
Blood contains red blood cells, white blood cells, platelets, and plasma. Based on levels of organization, blood is classified as this.
What is a tissue?
When someone exercises, their heart beats faster. Explain why this happens.
To deliver more oxygen and nutrients to working muscles and remove waste faster?
Explain how the muscular system helps the respiratory system function.
The diaphragm (a muscle) contracts and relaxes to move air in and out of the lungs?
Explain how the skeletal and muscular systems work together to move your arm.
Muscles contract and pull on bones, causing movement at joints?
The ribs protect the lungs. Which two systems are interacting?
What are the skeletal and respiratory systems?
A student says, “The heart is made of organ systems.” Explain why this statement is incorrect using levels of organization.
The heart is an organ made of tissues, not organ systems. Organ systems are made of organs.
A student claims the lungs move nutrients to body cells. Explain why this is incorrect and identify the correct system.
The circulatory system transports nutrients. The lungs exchange gases.
During intense exercise, breathing rate increases. Explain how this helps maintain homeostasis.
It increases oxygen intake and carbon dioxide removal to keep body systems balanced?
A student says bones only help with movement. Explain two other important functions of bones.
Bones protect organs and produce blood cells (and/or store minerals)?
Explain how at least three body systems interact when a person runs a race.
The muscular system moves the body, the respiratory system brings in oxygen, the circulatory system transports oxygen, and the skeletal system provides structure and support?