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Heart

Definition

noun, plural: hearts

(1) (anatomy) The chambered muscular organ of vertebrates that moves blood through the body by repeated, rhythmic contractions.

(2) The analogous contractile structure in invertebrates, such as annelids, mollusks, and arthropods.

(3) (botany) The core of a plant, fruit, vegetable, etc.; the solid central part without sap or albumen.

(2) That which resembles a heart in shape, i.e. a roundish figure with an obtuse point at one end and an indentation at the other end.

(3) A position relating to the mid or center, or that which is the most essential or vital part.


Supplement

In mammals and birds, the heart consists of four chambers: right and left ventricles, and right and left atria. In reptiles and amphibians, the heart has only three chambers. In fish, the heart is composed of one auricle and one ventricle.


Word origin: Middle English hert, from Old English heorte.

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Re:

In most cases, the heart is pointing down and to the anatomical left at an angle of about 5-10°. In rare cases, the heart can point to the anatomical right or in extremely rare cases can be inverted and pointing to the anatomical right. ...

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by jamesfrank
Thu Feb 12, 2015 6:38 am
 
Forum: Physiology
Topic: QRS complex
Replies: 4
Views: 6653

QRS complex

In most cases, the heart is pointing down and to the anatomical left at an angle of about 5-10°. In rare cases, the heart can point to the anatomical right or in extremely rare cases can be inverted and pointing to the anatomical right.

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by jamesfrank
Wed Jan 28, 2015 4:53 am
 
Forum: Physiology
Topic: QRS complex
Replies: 4
Views: 6653

Rice Bran

Rice bran oil can be extracted from the rice bran. Which is a healthy cooking oil good for heart.

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by josem
Sat Aug 30, 2014 7:35 pm
 
Forum: Molecular Biology
Topic: Rice Bran
Replies: 4
Views: 1616

Re: heart failure

Hi Zak im not sure if this is for some sort of class project or if its symptoms you are actually suffering. Hopefully not the latter. The signs of heart disease are not obvious all the time and sometimes a heart attack is the first indicator. There is also no single cause of heart disease but there ...

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by Narkata3
Sat Jun 21, 2014 6:35 am
 
Forum: Human Biology
Topic: heart failure
Replies: 2
Views: 4751

Hyperadrenergic POTS

... me explain. I have Hyperadrenergic POTS, so feel free to ask any questions. POTS (Postural Orthostatic Tachycardia Syndrome) is when a person’s heart rate speeds up 30 beats per minute or more without much change in blood pressure on standing, people may have orthostatic intolerance (OI). Because ...

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by rmorrison
Wed Mar 19, 2014 5:38 pm
 
Forum: Human Biology
Topic: Hyperadrenergic POTS
Replies: 0
Views: 6100
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