Question

Define :-
(i) Smooth Muscles
(ii) Sternum
Note : No spam, kindly do not copy from any website. ​

Answer 1

ANSWER :-

smooth muscles:-

• In general terms, "Smooth muscles" can simply be defined as the muscles which are non-striated in nature.

Extra Information :-

• Smooth muscles are involuntary in nature i.e. their movements can be controlled according to the will of the organism.

• Smooth muscles are innervated by the autonomic nervous system.

• Smooth muscles are found inside the walls of the hollow internal organs like the organs in the alimentary canal, the organs in the reproductive tract, blood vessels, etc.

• Smooth muscles play a very important role in the facilitation of movement of materials through the tubular organs.

Sternum:-

• The sternum is sometimes known as the breastbone. This flat bone sits at the front of the chest and connects to the ribs with cartilage

Function of sternum:-

• The most important function of sternum is that it protects the internal organs of our body like our heart , lungs , and the blood vessels that arise from the heart , lungs or enter into .
• The expansion and the contraction of the sternum aids in respiration , in inhalation and exhalation .

Parts of sternum:-

Sternum is divided into 3 parts :

• Manubrium .
• Gladiolus .
• Xiphoid process .

$\huge{\texttt{\underline{Explanation:}}}$

• The manabrium is the most important and the thickest part of the sternum.
• The manabrium is placed in a vital position and hence its thick .
• The xiphoid process is the thinnest part .
• The sternum is one of the longest flat bone present in our body in the chest portion .
• It is also known as the breast bone .
• The breast bone name is given because it is present close to the breast .
• The layers of the sternum acts as a shock absorber and protects the heart from damage .
• It aids in free movement of chest and other muscles nearby.
• Flexibility and protection are hence the most vital functions of the sternum .

__________________________

Answer 2

i) The sternum or breastbone is a long flat bone located in the central part of the chest. It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury. Shaped roughly like a necktie, it is one of the largest and longest flat bones of the body. Its three regions are the manubrium, the body, and the xiphoid process.[1] The word "sternum" originates from the Ancient Greek στέρνον (stérnon), meaning "chest.

ii) Smooth muscle, also called involuntary muscle, muscle that shows no cross stripes under microscopic magnification. It consists of narrow spindle-shaped cells with a single, centrally located nucleus. Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically.

pls mark me as brainlist plsplspls.