Human Heart Flashcards by Louzel Allena

is a muscular organ provides a Superior vena cava continuous blood circulation Aorta Pulmonary artery Pulmonary veins through the cardiac cycle Left atrium Right atrium and is one of the most vital 1 Pulmonary valve Mitral valve Aortic valve organs in the human body.

Human heart

How well did you know this?

Not at all

Perfectly

Is a muscular organ provides a Superior vena cava continuous blood circulation Aorta Pulmonary artery Pulmonary veins through the

Human Heart

How well did you know this?

Not at all

Perfectly

located between lungs in the middle of chest, behind and slightly to the left of sternum

Heart

How well did you know this?

Not at all

Perfectly

A double-layered membrane called the_______________ surrounds your heart like a sac.

pericardium

How well did you know this?

Not at all

Perfectly

The outer layer of the pericardium

Epicardium

How well did you know this?

Not at all

Perfectly

surrounds the roots of your heart’s major blood vessels and is attached by ligaments to your spinal column, diaphragm, and other parts of your body.

Epicardium

How well did you know this?

Not at all

Perfectly

The inner layer of the pericardium, is attached to the heart muscle

Endocardium

How well did you know this?

Not at all

Perfectly

The heart is divided by a septum into?

Two halves

How well did you know this?

Not at all

Perfectly

The two halves of the heart is divided into?

Four chambers

How well did you know this?

Not at all

Perfectly

The upper chambers of the heart are called

Left and right atria

How well did you know this?

Not at all

Perfectly

The lower chambers of the heart are called

Left and right ventricle

How well did you know this?

Not at all

Perfectly

This ventricle’s chamber walls are only about a half-inch thick, but they have enough force to push blood through the aortic valve and into your body.

Left ventricle

How well did you know this?

Not at all

Perfectly

Receives deoxygenated blood from the body

Right atrium

How well did you know this?

Not at all

Perfectly

Pumps deoxygenated blood to the lungs.

Right ventricle

How well did you know this?

Not at all

Perfectly

Receives oxygenated blood from the lungs.

Left atrium

How well did you know this?

Not at all

Perfectly

Pumps oxygenated blood to the rest of the body.

Left ventricle

How well did you know this?

Not at all

Perfectly

between right atrium and right ventricle

Tricuspid valve

How well did you know this?

Not at all

Perfectly

between right ventricle and pulmonary artery

Pulmonary Valve

How well did you know this?

Not at all

Perfectly

between left atrium and left ventricle

Mitral (bicuspid) valve

How well did you know this?

Not at all

Perfectly

between left ventricle and aorta

Aortic valve

How well did you know this?

Not at all

Perfectly

are flap-like structures that allow blood to flow in one direction.

Heart valves

How well did you know this?

Not at all

Perfectly

regulates blood flow between the right atrium and right ventricle.

The tricuspid valve

How well did you know this?

Not at all

Perfectly

controls blood flow from the right ventricle into the pulmonary arteries, which carry blood to your lungs to pick up oxygen.

Pulmonary valve

How well did you know this?

Not at all

Perfectly

lets oxygen-rich blood from your lungs pass from the left atrium into the left ventricle.

The mitral valve

How well did you know this?

Not at all

Perfectly

opens the way for oxygen-rich blood to pass from the left ventricle into the aorta, your body's largest artery, where it is delivered to the rest of your body.

The aortic valve

Cardiac muscle cells contract spontaneously. These contractions are coordinated by the?

Sinoatrial (SA) node

which is also referred to as the pacemaker of the heart.

Sinoatrial (SA) node

is located in the upper wall of the right atrium. When this contracts it generates nerve impulses that travel throughout the heart wall causing both atria to contract.

SA nodes (Sinoatrial node)

lies on the right side of the septum that divides the atria

Atrioventricular (AV) node

At the base of the heart the atrioventricular bundles start to divide further into thesw fibers. When the impulses reach these fibers they trigger the muscle fibers in the ventricles to contract

Purkinje

is the sequence of events that occurs when the heart beats.

Cardiac cycle

heart beats. There are two phases of the cardiac cycle:

1. Diastole phase 2. Systole phase

The right and left atria fills with blood.

Diastole phase

As blood collects in the upper chambers, the heart's pacemaker sends out an electrical signal that causes the atria to contract.

Diastole phase

In this phase the contraction pushes blood through the tricuspid and mitral valves into the resting lower chambers (the right and left ventricles).

Diastole phase

The second part of the pumping phase begins when the ventricles are full of blood

Systole phase

The electrical signals from the SA node travel along a pathway of cells to the ventricles, causing them to contract.

Systole Phase

In this phase the tricuspid and mitral valves shut tight to prevent a back flow of blood, the pulmonary and aortic valves are pushed open.

Systole phase

blood is pushed from the right ventricle into the lungs to pick up oxygen, oxygen-rich blood flows from the left ventricle to the heart and other parts of the body.

Systole Phase

blood moves into the pulmonary artery and the aorta, the ventricles relax, and the pulmonary and aortic valves close.

Cardiac cycle (heartbeat)

The lower pressure in the ventricles causes the tricuspid and mitral valves to open, and the cycle begins again.

Cardiac cycle (heartbeats)

The heart normally beats about?

60 to 80 times a minutes when rest

The force exerted by blood against vessel walls, measured as systolic/diastolic pressure

Blood pressure

The number of heartbeats per minute, regulated by the autonomic nervous system.

Heart rate

the portion of the cardiovascular system which transports oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart.

Pulmonary circulation

Oxygen deprived blood from the vena cava enters the right atrium of the heart and flows through the tricuspid valve into the right ventricle, from which it is pumped through the pulmonary semilunar valve into the pulmonary arteries which go to the lungs.

Pulmonary Circulation

Pulmonary veins return the now oxygen-rich blood to the heart, where it enters the left atrium before flowing through the mitral valve into the left ventricle. Then, oxygen-rich blood from the left ventricle is pumped out via the aorta, and on to the rest of the body.

Pulmonary circulation

it involves the movement of blood between the heart and the lungs.

Pulmonary circulation

Deoxygenated Blood is pumped from the right ventricle of the heart to the lungs via the pulmonary arteries. In the lungs, the blood picks up oxygen and releases carbon dioxide. Oxygenated blood then returns to the left atrium of the heart via the pulmonary veins

Process of pulmonary circulation

The heart works as a pump that pushes blood to the organs, tissues, and cells of body.

The circulatory system

Blood delivers oxygen and nutrients to every cell and removes the carbon dioxide and waste products made by those cells.

The circulatory system

Blood is carried from your heart to the rest of your body through a complex network of arteries, arterioles, and capillaries. Blood is returned to your heart through venules and veins.

The circulatory system

the portion of the cardiovascular system which transports oxygenated blood away from the heart, to the rest of the body, and returns oxygen-depleted blood back to the heart.

Systemic Circulation

In humans, blood is pumped from the strong left ventricle of the heart through arteries to peripheral tissues and returns to the right atrium of the heart through veins.

Systemic Circulation

carries oxygen

Arterial blood

Venous blood carries?

Carbon dioxide

which contain the most deoxygenated blood in the body

Pulmonary Arteries

Contains oxygenated blood

Pulmonary Veins

oxygen and nutrients are delivered to tissues, and carbon dioxide and waste products are picked up.

In the capillaries

Oxygenated blood flows from the?

left ventricle to the body tissues through the aorta and arteries.

The_____________ blood leaves the ____________through the_________________ into the left ventricle, gets pumped from the _________________through the_______________to the aorta

Oxygenated left atrium mitral (bicuspid) valve left ventricle aortic valve

the largest artery

Aorta

leaves the heart, curves in an inverted 'U' shape making an arch, and then descends downward.

Ascending aorta

is the main artery that carries blood away from your heart to the rest of your body.

Aorta

quickly divides into the right subclavian artery that supplies blood to the right arm and upper torso AND the right common carotid artery that supplies the head and neck.

brachiocephalic artery or innominate artery

supplies blood to the right arm and upper torso

Subclavian artery

that supplies the head and neck

Right common artery

supplies the head and neck.

Left common carotid artery

supplies the left arm and upper torso.

The left subclavian artery

means it is located below the clavicle or collarbone.

Subclavian

like every other organ or tissue in your body, needs oxygen-rich blood to survive

Heart Muscle

Blood is supplied to the heart by its own vascular system, called

Coronary circulation

the main blood supplier to the body

The aorta

The aorta (the main blood supplier to the body) branches off into two main coronary blood vessels

Arteries

branch off into smaller arteries, which supply oxygen-rich blood to the entire heart muscle.

coronary arteries

supplies blood mainly to the right side of the heart

Right coronary artery

supplies blood to the left side of the heart.

Left coronary artery