DIGESTIVE
What is the main job of the digestive system?
To break down food into nutrients the body can use
What is the control center of the nervous system?
The brain
What is the main function of the muscular system?
To allow movement of the body and its parts
What are two main jobs of the skeletal system?
Support/structure and protection of organs (also blood cell production)
What is the main job of the respiratory system?
To bring oxygen into the body and remove carbon dioxide
Name the long tube that food travels through from mouth to stomach.
Esophagus
How does the nervous system interact with the muscular system?
It sends signals that tell muscles when and how to contract
Name the three types of muscle tissue.
Skeletal, smooth, and cardiac
What connects bones to other bones at joints?
Ligaments
Name the main organs where gas exchange occurs.
The lungs (specifically the alveoli)
What in the intestine absorbs nutrients to bring it to the blood line.
What is Villi?
hat type of signal does the nervous system use to communicate quickly?
Electrical (and chemical) signals / nerve impulses
How do muscles and bones work together to create movement?
Muscles pull on bones (they cannot push); bones act as levers
How does the skeletal system interact with the muscular system?
Bones provide attachment points for muscles so movement can occur
How does the respiratory system interact with the circulatory system?
Oxygen moves from the lungs into the blood; carbon dioxide moves from the blood into the lungs to be exhaled
How does the digestive system interact with the circulatory system?
Nutrients from digested food are absorbed into the blood and transported throughout the body.
Describe how the nervous and respiratory systems work together during exercise.
The brain detects increased CO₂ and signals the body to breathe faster and deeper
Which type of muscle is found in the heart and works without conscious control?
Cardiac muscle
Where are blood cells produced?
In the bone marrow
What muscle is the primary muscle of breathing?
The diaphragm
Explain how the muscular system helps the digestive system.
Smooth muscles in the digestive tract create contractions to push food through and break down for nutrients.
Explain how the muscular system interacts with the digestive and circulatory systems.
Smooth muscle moves food through the digestive tract; cardiac muscle pumps blood; skeletal muscle helps return blood to the heart (especially in legs)
Describe how the skeletal and circulatory systems interact.
Bones protect the heart and major vessels; bone marrow produces red blood cells that carry oxygen in the blood
Explain how the respiratory, circulatory, and muscular systems work together during physical activity.
Breathing rate increases (respiratory), heart pumps faster (circulatory), and muscles use the extra oxygen while producing more CO₂ that must be removed