Respiratory System
What is the main organ responsible for breathing?
Lungs
What is the organ that pumps blood throughout the body?
Heart
What is the organ where food is first broken down into smaller pieces by chewing?
Mouth
What is the name of the hard structure that makes up the skeleton?
Bones
What is the main organ of the nervous system that controls all body functions?
Brain
Which gas do humans breathe in for respiration?
Oxygen
What is the name of the vessels that carry blood away from the heart?
Arteries
In which organ does most of the nutrient absorption take place?
Small intestine
Which type of tissue connects muscles to bones?
Tendons
What are the cells that carry messages through the nervous system called?
Neurons
Name the tube that connects the throat to the lungs, allowing air to pass.
Trachea
What are the two main types of blood cells found in the circulatory system?
Red blood cells and white blood cells
What is the name of the long tube that food travels down after it is swallowed?
Esophagus
How many bones are in the adult human body?
206
What part of the nervous system is protected by the spine?
Spinal cord
Which tiny air sacs in the lungs are responsible for the gas exchange with the blood?
Alveoli
Which two systems work together to deliver oxygen to the body's cells?
Respiratory and Circulatory System
What substance produced by the liver helps break down fats during digestion?
Bile
Which two systems help regulate body movement?
Musculoskeletal and nervous systems
What is the name of the part of the brain responsible for balance and coordination?
Cerebellum
How does the respiratory system interact with the circulatory system to remove carbon dioxide from the body?
The circulatory system transports carbon dioxide from the blood to the lungs, where it is expelled.
How does oxygen-rich blood get from the lungs to the heart?
Through pulmonary veins.
How does the digestive system support the circulatory system?
It provides nutrients to the blood that the circulatory system delivers throughout the body.
What are the three types of muscles?
Skeletal muscles, smooth muscles, and cardiac muscles.
How does the nervous system send electrical signals between neurons?
Through neurotransmitters.