respiratory s
your windpipe is also known as your _____
trachea
what does your nervous system do
carries messages from your brain to the rest of your body
part of the skeletal system, these "bones" start the digestive process
teeth
how many chambers does the heart have?
four
how many bones are in the human body
206
the respiratory system is in charge of _____ exchange in the human body
gas exchange
the retina contains receptor cells of two different shapes: rods and _____?
cones
this organ containins acids and enzymes that turns food into chyme
stomach
veins carry blood away from the heart or towards the heart?
towards the heart
most of your bones are located in your ____ and your _____
hands and feet
true or false: the left lung tends to be smaller than the right lung
true!! (fun fact: this is because the lungs make room for the heart, which is on the left side of the body)
true or false: our brain grows slightly every year
false: starting at 20, our brains lose 1-2 grams every year due to losing neurons
the liver produces _____
bile
what are the four main parts of the cardiovascular system?
heart, arteries, veins, capillaries
the collagen in your bones is always replenishing itself, so you have a new skeleton approx. every ___ years
7
hiccups occur when the ______ experiences involuntary contractions
diaphragm
what are the three main parts of the nervous system
brain, spinal cord, nerves
what are your stomach walls lined with to prevent acidic burns?
mucus
which blood cells are responsible for transporting oxygen?
red blood cells
your smallest bone is in your _____ and your largest bone is in your _____
ear (stapes) thigh ( femur)
name at least 5 major parts of the respiratory system
mouth, nose, lungs, larynx, trachea, diaphragm, pharynx, bronchi
neurons (there are 100 billion neurons in your brain!)
the _____ intestine absorbs nutrients and the _____ intestine handles waste
small, large
arteries
ligaments connect ____ to bones and tendons connect _____ to bones
ligaments connect bones to bones and tendons connect muscles to bones