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06. Human Circulatory System

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Last edited 25 days ago by Learn LoopHQ.

Chapter: 06. Human Circulatory System

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The circulatory system provides the body cells with food and oxygen and removes _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ from the body cells.

waste products

We have approximately _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ to _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ litres of blood in our body.

4.7, 5.5

Plasma is the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ part of blood, making up more than half of its volume.

liquid

Red blood corpuscles are also known as _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Erythrocytes

Haemoglobin combines with oxygen to form _ _ _ _ _ _ _ _ _ _ _ _ _ _ _, which transports oxygen.

oxyhaemoglobin

The life span of White Blood Corpuscles (WBCs) is approximately _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ to _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ days.

12, 20

Blood platelets help to stop bleeding at the site of injury by _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ the blood.

clotting

The blood vessels that carry blood away from the heart are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Arteries

All veins carry deoxygenated blood except the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ veins.

pulmonary

The finest blood vessels, with walls only one cell thick, are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

capillaries

The largest artery in the body is the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

aorta

The human heart has _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ chambers.

four

The valve present between the right auricle and right ventricle is called the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ valve.

tricuspid

The _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ventricle is the largest heart chamber and has the thickest wall.

left

The phase of heart muscle contraction is known as _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Systole

A normal human heart beats about _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ times per minute.

Blood pressure is measured by an instrument called a _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

sphygmomanometer

In the “lub” phase of the heart sound, the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ valves close.

cuspid

Karl Landsteiner discovered that human beings have special proteins called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ on the surface of RBCs.

antigens

Persons with blood group _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ are called universal recipients.

Healthy adults can donate blood every _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ days.

Eating fish like salmon and tuna provides _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fatty acids, which are beneficial for heart health.

omega-3

The rhythmic contraction of heart causing blood flow in the arteries can be felt as regular jerks called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

pulse

New RBCs are formed in the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

bone marrow

The _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ is a muscular wall that separates the left side of the heart from its right side.

septum

The upper two chambers of the heart are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ or atria.

auricles

The valve present between the left auricle and left ventricle is called the _ _ _ _ _ _ _ _ _ _ _ _ _ _ valve.

bicuspid

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