SD43Bio12 Circulatory System

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What is the main function of the capillaries?

Exchange of nutrients and wastes with tissues

Which generic blood vessel has the largest lumen?

Vein

Internal respiration occurs in what vessel?

Capillaries

What blood vessel has the largest cross-sectional area?

Capillary

Valves are present in which of the following?
Heart, aorta, veins

heart and veins

When atriums are in systole, the ventricles are in______

diastole

Blood from the lower body is brought to the heart through what?

Inferior/lower vena cava

The ______ brings blood to the kidneys.

renal artery

The _______ carries nutrients to a baby?

umbilical vein

At the arteriole end of a capillary, small molecules are squeezed out of capillaries because of what?

High blood pressure

Water failing to enter venous end of capillaries enter what system?

Lymphatic

What nerve connects to the heart?

Vagus Nerve

Which chamber of the heart does the aorta originate from?

Left ventricle

The structure separating the left and right side of the heart is called?

the septum

The AV node functions to control what?

Ventricular systole

True of false. The left region of the heart is more muscular than the right.

True

What prevents the inversion of the valves in the heart?

Chordae Tendinae and papilliary muscles

The SA node receives stimuli from what?

Medulla Oblongata

Where in your upper body does your carotid artery go?

Neck/head

The hepatic portal vein connects which 2 organs together?

Intestine and liver

In a fetal circuit, what is the function of the venous duct?

To bypass the fetal liver as it is still unfunctional

Which is larger the umbilical vein or artery?

Vein

The pulmonary circuit carries blood from ______ to the _______.

Heart -> lungs

What component of blood helps with blood clotting?

Platelets

The function of red blood cells is to?

Carry oxygen to cells

Generally speaking, the life span of which component of blood is the longest?

red blood cells

Which compound in hemoglobin functions to carry oxygen?

Iron

After entering the right ventricle, blood will then be pumped into the ________.

Pulmonary trunk

What are the functions of the circulatory system?

Maintain body temperature
Exchange of oxygen and wastes

Which 2 vessels enter the right atria?

Inferior and superior vena cavas

True of false. The semi-lunar valves are found in all veins.

False

An optimal resting blood pressure reading would be...

120/80

True of false. Blood is a connective tissue.

True

The white blood cells in blood are used to....

fight infections by engulfing foreign cells

The aorta branches into what?

Numerous arteries

Foreign substances in the circulatory system are called?

Antigens

What is pulmonary edema?

The pooling of tissue fluid in lungs

In the left region of the heart is the blood oxygenated or deoxygenated?

oxygenated

What unit is used to measure blood pressure?

mm Hg (mercury)

The sinoatrial node is responsible for what?

intrinsic heart beat

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