Explain the diaphragm, Science

Assignment Help:

Explain the Diaphragm

The diaphragm is a muscular membranous partition separating the abdominal and thoracic cavities and functioning in respiration. It consists of a central tendon from which the muscle fibres radiate.

When the diaphragm contracts, its muscle fibres shorten and the central tendon is pulled downwards. Thus, the thoracic cavity is enlarged in length. The diaphragm is supplied by phrenic nerves. Phrenic nerves are a pair of nerves that arises from cervical spinal roots and passes down the thorax to innervate the diaphragm and control breathing.

The muscles of the diaphragm and the intercostal muscles contract simultaneously. Thus, the thoracic cavity is enlarged in all directions (antero-postenor and vertical). Next, let us study about the third set of muscles involved in respiration, i.e., abductor muscles.


Related Discussions:- Explain the diaphragm

Scientific activity, Describe the factors which decide the broad area of Sc...

Describe the factors which decide the broad area of Scientific activity?

Astronomy, is it true or false that, as the universe expands, it is expandi...

is it true or false that, as the universe expands, it is expanding within an already existing universe

Milky way galaxy, The Milky Way Galaxy: The white band  stretched ac...

The Milky Way Galaxy: The white band  stretched across the night  sky  is, in  fact, a partial view of  the Milky Way Galaxy. Being inside  the Galaxy, we can see it only in

Forebrain , Forebrain: The largest part of  the brain that you  see in ...

Forebrain: The largest part of  the brain that you  see in Fig. is the cerebrum. It consists of  two halves or hemispheres  joined  together by  a band of  nerve fibres. Intere

Describe biosynthesis of nonessential amino acids, Describe Biosynthesis of...

Describe Biosynthesis of Nonessential Amino Acids ? This label 'nonessential' may mislead some people into believing that we don't need it. But, in essence, "non essential" as

Geocentric universe of the ancients, Geocentric Universe of  the Ancients:...

Geocentric Universe of  the Ancients: The  earliest ideas of  the Egyptians and Sumerians about the universe may seem strangeto us. The Earth appeared flat 2nd solid tg them.

Physico-chemical properties of pantothenic acid, Important physico-chemical...

Important physico-chemical properties of pantothenic acid are as follows: a) Pantothenic acid  is a pale yellow oily liquid that can only be crystallized as its sodium, potassi

Explain the types of sedimentary rocks, Explain the Types of sedimentary ro...

Explain the Types of sedimentary rocks? What is a sedimentary rock? The word sedimentary is derived from the Latin word sedimentum which means "settling", which refers to a so

Explain the emergency contraceptive pill (ecp) method, Explain the Emergenc...

Explain the Emergency Contraceptive Pill (ECP) method The ECP method or "morning after pill" uses a high dose of combined oral contraceptives (OCs) to prevent conception. The O

Explain the alpha fetoprotein screening (afp), Explain the Alpha Fetoprotei...

Explain the Alpha Fetoprotein Screening (AFP) This is a blood test that measures the level of alpha-fetoprotein in the mothers' blood during pregnancy. AFP is a protein normall

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd