Lungs , The Largest Organ in The Human Body

Assalamu’alaikum.

Good morning everyone, sorry DS wrote the article the early morning like today. This is due to the busyness of the DS as a student, entrepreneur, and teachers teach, which makes the DS back should ignore in writing articles. Again and again. However, inshaAllah every article written DS will remain continuous and sustainable benefit.

Furthermore, for the first, we will discuss the lungs.

Lungs.

The lungs are the largest organ of our body, lungs beat skin which occupies the second position as the largest organ, with an area of ​​40 m2. 40 m2 for air exchange. can we imagine an area of ​​the field, right?

The upper limit of the lung itself (the apex of the lung) reach the sternal end of the 1st rib. At the bottom of the borders with diaphragms. And are covered by a rib that wraps from the lung itself. Being the center bordered by mediastinal, which contains the heart, esophagus, and so on.

The structure of the lung itself is divided into lobes. In the right lung, consisting of three lobes, the upper lobe, middle, and bottom are separated by fissures oblique and horizontal fissures. Whereas the left lung has only oblique fissure that does not have a middle lobe. On the part of the left upper lobe, there is a section called lingual.

Structure and out of the lungs through the pulmonary hilum, which veiled by pleural air bag loose. Moderate bleeding system through the pulmonary artery and pulmonary vein. Through the lymphatic drainage of the tracheobronchial lymph nodes and headed to the lymph trunks. Medium persarafannya, there is only the parietal pleura, bronchi (if bronchi) are supplied by the pulmonary plexus, a collection of pulmonary nerves.

Respiratory mechanism

Human respiratory distinguished on the chest breathing and abdominal breathing . Breathing chest and abdominal breathing occurs through the inspiratory and expiratory phases .

1. Chest Breathing Mechanism

a. Inspiration Phase chest breathing

Chest breathing inspiration mechanism as follows :

The muscles between the ribs ( muscular external intercostalis ) contract - > raised ribs ( flat position ) - > lungs inflate - > air pressure in the lungs become smaller than the outside air pressure - > outside air into the lungs

b . Expiratory phase of breathing chest

Expiratory abdominal breathing mechanism is as follows :

Relaxation of the muscles between the ribs - > rib decreases - > lungs shrink - > air pressure in the lungs is greater than the outside air pressure - > air out of the lungs .

2. Abdominal Breathing Mechanism

a. Abdominal breathing inspiration phase

Abdominal breathing inspiration mechanism as follows:

diaphragm (diafraghma) contract -> position of the curved into a flat -> lungs inflate -> air pressure in the lung is smaller than the outside air pressure -> incoming air

b. Expiratory phase abdominal breathing

Expiratory abdominal breathing mechanism as follows:

diafraghma muscle relaxation -> position of the horizontal curved back -> lungs deflate -> air pressure in the lungs more Besas than the outside air pressure -> air out of the lungs.

Well, at the time of the expiratory phase, and there he came out CO2 and H2O which is a residual substance from expiratory system. And the incoming O2, we can perform the activity, because ATP is burned into energy for the cell activity in our bodies.

Don't Forget to Breath. :)

It was nice to be able to explain, although not detailed, but it may at least give you an idea about the largest organ in our body.

Stay healthy, keep reading, keep monitoring Blog is full of science. Remain with DS. Because science is the diversity of life.

Wassalamu’alaikum.

Sources :

-Faiz, Omar dan David Moffat.2003.At a Glance Series ANATOMI.Jakarta:Erlangga

-Suryo, Joko.2010.Herbal Penyembuh Gangguan Sistem Pernapasan.Yogyakarta:B First

-Evelyn C, Pearce. (2009). Anatomi dan Fisiologi untuk Paramedis. Jakarta: PT Gramedia Pustaka Utama