Skeletal System
What is the main function of bones?
To support and protect the body, and produce blood cells.
What is the function of muscles?
To allow movement of the body.
What does the heart do?
Pumps blood throughout the body.
What is the primary organ of respiration?
The lungs.
What is the main function of the nervous system?
To control and coordinate body activities.
How many bones are in the adult human body?
206 bones.
What are the three types of muscles?
Skeletal, smooth, and cardiac muscles.
What are the main components of blood?
Red blood cells, white blood cells, platelets, and plasma.
What gas do we inhale?
Oxygen.
What are neurons?
The basic units of the nervous system that transmit signals.
What is the name of the bone that protects the brain?
The skull.
What type of muscle is found in the heart?
Cardiac muscle.
What is the function of veins?
To carry blood back to the heart.
What process do we call breathing in and out?
Respiration.
What part of the brain controls balance?
The cerebellum.
What is the longest bone in the human body?
The femur.
How do muscles work in pairs?
When one muscle contracts, the other relaxes to allow movement.
How does oxygen get from the lungs to the blood?
Through the process of diffusion in the alveoli.
How does the diaphragm assist in breathing?
It contracts to create a vacuum that pulls air into the lungs.
What is the spinal cord's role?
To transmit signals between the brain and the rest of the body.
What are the two main types of bone?
Compact bone and spongy bone.
What is the term for a muscle that relaxes?
Antagonist.
What is the largest artery in the body?
The aorta.
What is the function of the alveoli?
To exchange oxygen and carbon dioxide with the blood.
How do reflex actions work?
They occur through a quick, automatic response to a stimulus without involving the brain.