Blood Pressure:
Systolic Pressure vs. Diastolic Pressure

There are two types of blood pressure: systolic pressure and diastolic pressure.

20170421 blood pressure
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Where do the two different blood pressure come from?  The answer is: heart contractions.

The word “heart contraction” describes the heart’s muscle movements which squeeze blood out of the ventricles and then relaxes.  An average human heart contracts ~115,000 times a day.  Your heart contractions keep blood moving in your body, so your vital organs can constantly receive important nutrients and substances.

Systolic Pressure vs. Diastolic Pressure

Systolic Pressure:
During the “squeezing down” part of the heart contraction, blood flows powerfully out of the heart and creates a strong blood pressure called the systolic blood pressure.

Diastolic Pressure:
During the “relaxed” part of the heart contraction, blood does not flow out of the heart.  This creates a weak blood pressure called the diastolic blood pressure.it is the left ventricle or the right ventricle, they always send blood out and away from the heart.

 

Next Generation Science Standards:

MS-LS1-3 Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.

HS-LS1-2 Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.

HS-LS1-3 Plan and conduct an investigation to provide evidence that feedback mechanisms maintain homeostasis.

What Science Does this Comic Teach?

Unit: Anatomy

⇒Chapter: Immunology

⇒Topic: Blood Pressure: Systolic Pressure vs. Diastolic Pressure

Additional Information

Ventricle

A ventricle is a chamber of the heart that is responsible for pushing blood out of the heart.  The human heart has two ventricles–1 right ventricle and 1 left ventricle.

Atrium

An atrium is a chamber of the heart that is responsible for receiving blood into the heart.  The human heart has two atria (atria: plural form of atrium)–1 right atrium and 1 left atrium.

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