The organ which is responsible for "pumping" blood to all of the regions of the body is known as what?

The protective sac in which the heart is found is known as what?

The human heart is found in the _____________ cavity in the human body.

The muscular tissue of your heart, known as _____________, is what contracts to pump blood through the circulatory system.

The human heart is a _____________________ muscle, meaning that it operates without conscious thought.

The right and left sides of the heart are separated by the _______________, which prevents the oxygen rich and oxygen poor blood from mixing.

The upper chambers of the heart receives the incoming blood, and are known as what?

The lower chambers of the heart which pump blood out of the heart, are known as what?

Deoxygenated blood passes from the ___________ into the right ventricle, and goes to the lungs.

From the lungs, blood moves back towards the heart into the left atrium, to the ______________________________, and then to the aorta.

Flaps of connective tissue, called _______________, are located between the atria and ventricles of the heart to maintain pressure and prevent blood from being leaked back into the heart.

Each contraction begins with a group of specialized cardiac muscle cells in the right atrium known as the _______________, causing the atria of the heart to contract, sending blood into the ventricles.

This node of the heart is known as the natural "pacemaker"?

From the SA node, a signal is sent to this _______________ structure, and then to a bundle of fibers in the ventricle, causing them to contract and pump blood out of the heart.

The three main types of blood vessels are the arteries, veins, and ________________.

The largest blood vessels of the body which carry oxygen rich blood away from the heart are known as what?

The smallest of the blood vessels, the ________________ are important for bringing nutrients and oxygen to less innervated tissues.

Many of these structures are found near large skeletal muscles, and are responsible for returning oxygen-poor blood to the heart.

This disease of the cardiovascular system is characterized by fatty deposits (plaque) in walls of arteries

which can obstruct flow of blood and raise blood pressure.

When evaluating the blood pressure of the heart and arteries, the force felt in the arteries when the ventricles contract is known as what?

The _______________ pressure of the cardiovascular system is the force of the blood on the arteries when the ventricles relax.

Due to atherosclerosis, coronary arteries may become blocked, meaning blood can’t get to heart muscle and muscle tissue may begin to die, which is known as __________________________.

Blood is composed of blood cells and _______________?

What plasma proteins transport substances such as fatty acids, hormones and vitamins?

Which plasma protein(s) are responsible for the bodies ability to clot?

This type of blood cell is responsible for binding and transporting oxygen, and is what gives blood its red color.

This type of blood cell is responsible for fighting against infection, parasites, and bacteria, as well as producing antibodies which fight and remember germs.

Platelets are responsible for forming clots in the body by secreting ____________ to help form clots.

What is one type of genetic disorder which disrupts the body's ability to clot and can be life threatening?