anp quiz human circulatory system

The heart

-Located near the center of you chest

-Hollow structure

Myocardium

Two layers of tissue form a sandwich around a thick layer of muscle called the?

72

The heart contracts about how many times per minute?

70mL

How many ml pumps of blood with each contraction?

Septum

What is it called that makes the right and left sides of the heart separated by a wall

atrium

Upper chamber of septum

Ventricle

The lower chamber of septum

4

How many chambers does the heart have

Valves

As the heart contracts, blood flows into the ventricles and then out through the ventricles

Heart Beat

Heart muscles are composed of individual fibers

Arteries,Capillaries,Veins

3 types of blood vessels

Arteries

-Large vessels

-Carry blood from heart to tissues of body

Capillaries

-Smallest blood vessels

-Walls are only one cell thick and very narrow

Veins

Once blood has passed through the capillary systems it must be returned to the heart

Blood Pressure

The force of blood on the wall of the arteries is known as

Systolic pressure

The first number taken, is the force felt in the arteries when the ventricles contract

The second number taken, is the force of the blood on the arteries when the ventricles relax

Artherosclerosis

Fatty deposits (plaque) in walls of arteries

Heart attack

Heart muscle begins to die due to lack of O2

Stroke

Blood clot may break free and block a vessel leading to the brain

Blood

Composed of plasma and blood cells

Red blood cells, white blood cells, Platelets

Types of cells are

Plasma

-Straw colored

-90% water

Albumins and Globulins

Transport substances such as fatty acids, hormones and vitamins

Fibrinogen

Responsible for blood’s ability to clot

Red blood cells

Most numerous type , transport oxygen and disk shaped

White blood cells

Guard against infection, fight parasites and attack bacteria

Platelets

Aid the body in clotting

Hemophelia

Genetic disorder that disrupts clotting