Lungs

Food normally goes in your throat when you swallow. A coordinated swallow reflex, controlled partially by the tongue, helps you control the timing of swallowing.

No you need a heart and a brain too...

Humans cannot breathe through their skin because they are large organisms. Smaller organisms, such as frogs or flatworms, are able to absorb oxygen through their skin because the oxygen doesn't have to travel fr from the surface of the skin. It also has to do with the fact that human skin isn't as moist as the skin of frogs, etc., and moist skin is required for transdermal breathing.

There isn't an air sac in the lungs, They're alveolis that take in the air and expand to improve their surface area, causing your diaphragm to expand and shrink when you breathe, but the function is to allow you to respire.

1. Ciliated cells, the most numerous of the cell types, extend through the full thickness of the epithelium provide a coordinated sweeping motion of the mucus coat called the "ciliary escalator" that serves as an important protective mechanism for removing small inhaled particles.
2. Mucous (goblet) cells which are interspersed among the ciliated cells and also extend through the full thickness of the epithelium producing mucous.
3. Brush cells which are columnar cells that bear microvilli. The basal surface is in synaptic contact with the afferent nerve endings and the detect sensations.
4. Small granule cells whose cytoplasm processes is sometimes observed extending to the lumen and cytoplasm contains numerous, membrane-bonded, dense-core granules.
5. Basal cells which serve as a reserve population by maintaining individual cell replacement in the epithelium.

The thoracic cavity contains the heart and lungs. The large artery (aorta) that comes off the heart is there as well.

trachea
Trachea

my father is 32 and he doesn t smoke or drink and is only 15 to 16 tone and about 5,11 in height what could a pain in his lung be is face eems a littl bit red as well h has NT had high blood pressure or calstural so what could the red face be

my father is 32 and he doesn t smoke or drink and is only 15 to 16 tone and about 5,11 in height what could a pain in his lung be is face eems a littl bit red as well h has NT had high blood pressure or calstural so what could the red face be

In the two lateral chambers of the thoracic cavity.

If you exercise 3-4 days a week, your lung capacity grows allowing you to exercise for longer periods of time. When you do an aerobic exercise, your heart and lungs work harder to get more oxygen around the body. Your lungs take oxygen in and then pass it on to your heart which then passes the oxygen onto your blood vessels to circulate the oxygen around the body. The oxygen is usually taken to the muscles in the limbs (Arms and Legs) to help keep them moving.

The elastic fibres recoil after the alveoli contract during expiration. The surfactant on the inner surface also helps to stop the alveolar walls 'sticking' together which will stop air from coming due to the pressure not being able to decrease

The carbon dioxide is exhaled.

terminal bronchioles

Your skin and your mucus membranes are your body's first line of defense against any pathogen whether that be dust, or a virus!

Cancer is not congenital. It is very rare for a child to get cancer, and even more rarely developed in the first stages of life.

The heart is the pump that circulates blood throughout the body. The body itself does not actively push the blood along by any means, though there are one-way valves in the veins where the pressure is lower. Ultimately the deoxygenated blood reaches the heart due to the pressure of the blood behind it, constantly being pumped forward by the heart.

Mediastinum. That is the cavity that contains the heart.

Yes Lung cancer makes it extremely hard to breathe!

The right side of the heart (right atrium and right ventricle) receives blood low on O2.

Worst case scenario you get a bubble of air in your vein (called an embolism) which travels to your heart or lungs, and due to a complicated process involving gas pressures and such, you die. Of course the likelihood of being accidently injected with enough air to cause real harm is quite small. Most bubbles of air will simply be absorbed into your blood stream, and you will go on to have a happy, oblivious life.

This is part of breathing in, or inspiration. The trachea splits into the two bronchi (singular: bronchus) one of which goes to each lung.

The alveoli in the lungs.

Yes, alligators have lungs and breathe air just like you do. They CAN hold their breath for a long time while they are under water, though!