Nervous System
What is the main function of the nervous system?
To control and coordinate the body's responses to internal and external stimuli
What is the primary function of the digestive system?
To break down food and absorb nutrients
What is the primary function of the respiratory system?
To facilitate gas exchange, bringing in oxygen and expelling carbon dioxide
What is the main function of the excretory system?
To remove waste products from the body
What is the primary function of the cardiovascular system?
To circulate blood throughout the body
What are the basic building blocks of the nervous system?
Neurons
Where does digestion begin?
The mouth
What is the main organ of the respiratory system?
The lungs
Which organ filters blood to produce urine?
The kidneys
What is the main organ of the cardiovascular system?
The heart
What part of the brain is responsible for balance and coordination?
Cerebellum
What organ is responsible for producing bile?
The liver
What are tiny, hair-like projections that move together in a sweeping motion?
Cilia
What is the tube that carries urine from the kidneys to the bladder?
The ureters
What are the blood vessels that carry blood away from the heart called?
The arteries
What is a reflex action?
An automatic response to a stimulus that does not require conscious thought
What is the role of the small intestine?
To absorb most of the nutrients from food
What structure prevents food from entering the trachea during swallowing?
The epiglottis
What is the role of the bladder?
To store urine until it is excreted
What is a group of cells located in the right atrium that sends a signal for the heart to contract called?
The pacemaker
What are neurotransmitters?
Chemicals that transmit signals across a synapse from one neuron to another.
What is the function of the pancreas in digestion?
To produce digestive enzymes and hormones like insulin
What is the role of alveoli in the respiratory system?
To provide a large surface area for gas exchange
What is the small tube in which urine leaves the body called?
The urethra
What exists in the heart to prevent blood from flowing backwards?
Valves