Circulatory System

circulatory system’s job

transport oxygen,  and nutrients through the body.  It also removes carbon dioxide

systematic circuit

carries blood to the cells and tissues of the body

pulmonary circuit

carries blood to the lungs

left side of the heart pumps blood to

systematic circuit

right side of the heart pumps blood to

pulmonary circuit

systematic circuit

Left ventricle, aorta, cells and tissue of the body, superior and inferior vena cava, right atrium

pulmonary circuit

Right ventricle, pulmonary arteries, lungs, pulmonary veins, left atrium

oxygenated blood

Left atrium, left ventricle

deoxygenated blood

Right atrium, right ventricle

muscle cells of the heart

cardiomyocytes/cardiac muscle cells

arteries

vessels that carry blood away from the heart

veins

vessels that return blood to the heart

capillaries

in between the arteries and the veins

small in diameter and have thin layers

what diffuses across the capillaries?

oxygen, nutrients, and waste molecules

how does blood travel through the arteries?

blood pressure

how does blood travel through the veins?

skeletal muscle contractions and one-way valves

arteries have more_______ than veins

muscle and elastic tissue

because they have greater pressure exerted on their walls

how is the cardiac cycle regulated?

electrochemical signals

contraction

systole

relaxation

diastole

internal pacemaker

sinoatrial mode

atria contract and force blood to the ______

ventricles

what prevents backflow between the atria and ventricles?

valves

ventricles contract an force blood out of the _______

pulmonary artery and aorta

what produces the lub dub sound?

closing of heart valves

The large vessels that carry blood to the heart are

veins

Which part of the blood is mainly responsible for carrying oxygen?

red blood cells

The arteries experience the highest pressure during the contraction phase of the heart beat called _____ .

systole

Inhalation is caused when the diaphragm and intercostal muscles ______.  This creates ______ pressure.  When these muscles ______ exhalation occurs.

contract

negative

relax

Starting at the pulmonary artery, which of the following correctly traces the flow of blood through the heart?

 pulmonary artery -> pulmonary vein -> left atrium -> left ventricle –> aorta

In healthy humans, hemoglobin functions to transport _____ .

oxygen

The abundant protein in blood, which is arguably the most critical for oxygen homeostasis in the body, is

hemoglobin

Blood traveling through the pulmonary arteries are oxygen _________________ (rich or deficient).

deficient