Grace ran 1 mile. She felt her heart beating faster in her chest. Her pulse was also faster in her wrist. Grace wondered in which human body system the heart and blood vessels worked together. Both the heart and blood vessels are important parts of the ..... system.

CARDIOVASCULAR SYSTEM

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Grace ran 1 mile. She felt her heart beating faster in her chest. Her pulse was also faster in her wrist. Grace wondered in which human body system the heart and blood vessels worked together. Both the heart and blood vessels are important parts of the ____ system.

A	excretory
B	muscular
C	respiratory
D	cardiovascular

Explanation:

Detailed explanation-1: -The electrical signal starts in the right atrium where your heart’s natural pacemaker-the sino–atrial node-is situated. This signal crosses the atria, making them contract. Blood is pumped through the valves into the ventricles.

Detailed explanation-2: -The blood first enters the right atrium from the superior and inferior vena cava. It then flows through the tricuspid valve into the right ventricle. The blood then moves through the pulmonary valve into the pulmonary artery. The pulmonary artery carries blood to the lungs where it takes up oxygen.

Detailed explanation-3: -Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart.

There is 1 question to complete.

MICROANATOMY

BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS

CARDIOVASCULAR SYSTEM