The heart

Question 1

Describe the arteries?

Answer 1

blood vessels that consist of muscle and tissue.
They have three layers- inner layer called the intima that contains tissue, the middle layer called media that is made up of muscle and outer layer called adventitia that also consists of tissue.

Question 2

what is the function of the arteries?

Answer 2

Arteries are blood vessels that transport blood rich in oxygen away from the heart.

Question 3

Describe the Aorta?

Answer 3

The aorta is the largest artery in the body. it is connected to the hearts left ventricle.

Question 4

what is the function of the Aorta?

Answer 4

It carries oxygenated blood away from the heart.

Question 5

Describe the pulmonary artery?

Answer 5

The pulmonary artery is connected to the bottom of the hearts right ventricle. It branches into left and right pulmonary arteries that then extend into the left and right lungs.

Question 6

What is the function of the pulmonary artery?

Answer 6

The artery that carries blood from the right ventricle of the heart to the lungs for oxygenation.

Question 7

Description of the pulmonary vein?

Answer 7

There are four pulmonary veins that extend from he left atrium to the lungs: the right superior, the right inferior, the left superior, and the left inferior.

Question 8

what is the function of the pulmonary vein?

Answer 8

Pulmonary veins carry oxygenated blood from the lungs to the left atrium of the heart.

Question 9

Describe the left atrium?

Answer 9

The heart is divided into four chambers; the upper two heart chambers are called atria and are divided into a left and right atrium.

Question 10

what is the function of the left atrium?

Answer 10

receives blood returning to the heart from the pulmonary veins.

Question 11

Describe the mitral (bicuspid) valve?

Answer 11

The mitral valve is located between the left atrium and the left ventricle.

Question 12

what is the function of the Mitral (bicuspid) valve?

Answer 12

Prevents the back flow of the blood as it is pumped from the left atrium to the left ventricle.

Question 13

Describe the left ventricle?

Answer 13

The heart is divided into four chambers; the lower two heart chambers are called ventricles and divided into the left and right ventricle.

Question 14

what is the function of the left ventricle?

Answer 14

The left ventricle receives blood from the left atrium and pumps it to the aorta.

Question 15

Describe the purkinje fibres?

Answer 15

The purkinje fibres are muscle fibres located at the base of the heart and extending from the atrioventricular bundles of fibres.

Question 16

what is the function of the purkinje fibres?

Answer 16

They transmit Impulses from the atrioventricular node to the ventricles of the heart and cause them to contract.

Question 17

Describe the septum?

Answer 17

The septum of the heart contains atrioventricular bundle fibres through which cardiac impulses are carried down the septum to the ventricles of the heart.

Question 18

what is the function of the septum?

Answer 18

The septum separates the lower chambers of the heart into the left ventricle and the right ventricle.

Question 19

Describe the inferior Vena cava?

Answer 19

The inferior vena cava is one of the largest veins in the body. It is located in the lower back.

Question 20

what is the function of the inferior vena cava?

Answer 20

Returns de- oxygenated blood from the legs, back, abdomen and pelvis to the right atrium.

Question 21

Describe the right ventricle?

Answer 21

The heart is divided into four chambers; the lower two heart chambers are called ventricles and divided into a left and right ventricle.

Question 22

what is the function of the right ventricle?

Answer 22

Receives blood from the right atrium and pumps it to the main pulmonary artery.

Question 23

Describe the tricuspid valve?

Answer 23

The tricuspid valve is located between the right atrium and the right ventricle of the heart.

Question 24

what is the function of the tricuspid valve?

Answer 24

prevents blood flow back into the right atrium of the heart.

Question 25

Describe the right atrium?

Answer 25

The heart is divided into four chambers: the upper two heart chambers are called the atria and are divided into the left and right atrium.

Question 26

what is the function of the right atrium?

Answer 26

The right atrium receives blood returning to the heart from the superior and inferior vena cava.

Question 27

Describe the Atrioventricular node?

Answer 27

The AV node consists of tissue and is located near the bottom of the right atrium.

Question 28

what is the function of the AV node?

Answer 28

It sends impulses to the atrioventricular bundles of fibres and slows down impulses from the sinoatrial node to allow the atria of the heart to contract.

Question 29

Describe the pulmonary veins?

Answer 29

pulmonary veins are blood vessels. There are four pulmonary veins: the right superior, right inferior, left superior, and left inferior.

Question 30

what is the function of the pulmonary veins?

Answer 30

pulmonary veins carry deoxygenated blood from the lungs to the left atrium.

Question 31

Describe the sinoatrial node (SA)?

Answer 31

The sinoatrial node is often referred to as the pacemaker of the heart and is located in the upper part of the hearts right atrium.

Question 32

What is the function of the SA node?

Answer 32

it helps to control the heart rate by sending impulses through the heart muscle.

Question 33

Describe the superior vena cava?

Answer 33

The superior vena cava is one of the largest veins in the body. It is located in the upper chest.

Question 34

what is the function of the superior vena cava?

Answer 34

The superior vena cava returns de-oxygenated blood rom the head, neck, arm and chest to the right atrium.