trachea, a tube that connects the throat to the lungs. From the trachea, air travels into the bronchi, which branch off into each lung. Within the lungs, air moves into smaller air sacs called alveoli, where the exchange of oxygen and carbon dioxide occurs. This process is essential for supplying oxygen to the bloodstream and removing waste gases.
trachea, which then branches into the bronchi and bronchioles, ultimately reaching the alveoli in the lungs. This is where the exchange of oxygen and carbon dioxide with the bloodstream takes place.
trachea
When light enters the eye, it first passes through the cornea, which is the transparent outer layer of the eye. The cornea helps to focus the light as it enters, before it passes through the aqueous humor and then the pupil, which is controlled by the iris to regulate the amount of light that continues into the eye.
Blood passes through the bicuspid valve and enters the left ventricle.
As light enters the eye, it passes through the cornea, the aqueous humor, the lens, and finally reaches the retina. These structures help to focus and transmit the incoming light to the photoreceptor cells in the retina where the visual signals are initiated.
throat, bronchies, lungs
inhale air which passes through the lungs then veins takes it to the heart and it takes it round the body
the carotid artery passes through the carotid canal to the brain
whatever is snorted passes through the nasal cavity, then proceeds to the lungs, like anything you inhale.
it first passes through the duodenum
When you inhale, oxygen enters your lungs and diffuses into your bloodstream through tiny air sacs called alveoli. The oxygen is then carried by red blood cells in the blood vessels to different tissues and organs in your body. Once the oxygen reaches the cells, it is used in cellular respiration to produce energy.
Light first enters the eye through the cornea, then passes through the pupil and the lens before reaching the rods and cones in the retina.