Respiratory
The two main gases that we inhale and exhale
Oxygen and Carbon Dioxide
A large muscle that pumps blood throughout the body
heart
This organ acts as the control center of the nervous system.
brain
Do hormonal messages move faster or slower than electrical messages when moving from a body part to the brain?
slower
This organ begins the process of digestion by mechanically breaking down food with teeth and mixing it with saliva.
mouth
The muscle that causes our lungs to expand and contract
diaphragm
We have veins, arteries and __________ that help to transport blood
capillaries
These long, thin cells carry electrical messages throughout the body.
neurons
Hormones travel throughout the body via this system.
bloodstream (circulatory system)
These tiny finger-like projections in the small intestine increase the surface area for absorbing nutrients.
villi
The main tube that connects the mouth to the lungs
trachea
Human blood is 55% plasma, which is made up of 90% _______
water
This part of the nervous system includes the brain and spinal cord
central nervous system (CNS)
Released by the adrenals, this hormone prepares the body for emergencies.
adrenaline (epinephrine)
This organ in the excretory system filters the blood to remove urea, excess salts, and water, forming urine.
kidney
The small piece of cartilage that is a protective lid to prevent food and liquid from entering your lungs.
epiglottis
The main artery that leaves the heart with oxygen enriched blood
aorta
When you step on a Lego, your nervous system first sends an __________________ signal from your foot to your brain.
electrical
Which gland is considered the 'master gland', is located at the base of the brain, and regulates many other glands?
pituitary
This part of the digestive system is responsible for absorbing most of the body’s water from undigested food.
large intestine
A balloon like sack where gas exchange occurs in your lungs and oxygen enters the blood stream.
Alveoli/ alveolus
Blood vessels that carry blood to and from the lungs are called _______
pulmonary veins and arteries
The part of the nervous system that energizes our body, preparing it for actions
Sympathetic (part of the autonomic nervous system)
Which gland affects metabolism?
thyroid
This tube carries urine from the kidneys to the bladder, and swelling or blockage here can cause severe back or pain in your sides.
ureter