It refers to the liquid portion of the blood.

(a)  

also known as red blood cells

(a)  

also known as white blood cells

(a)  

also known as platelets

(a)  

It is a protein that contains iron and carries the oxygen during the exchanges of gases.

(a)  

It is a network of blood-carrying tubes responsible for the distribution of oxygen and nutrients to the cells and collection of metabolic waste and carbon dioxide from the cells.

(a)  

small disc- shaped fragments of bone large bone marrow cells

(a)  

thinnest vessels in the circulatory system

(a)  

main organ of the cardiovascular system

(a)  

largest and thickest blood vessels

(a)  

microscopic invaders

(a)  

interconnected tunnels or passages of the blood

(a)  

Its main function is to carry oxygen and nutrient-rich blood away from the heart.

(a)  

largest artery

(a)  

It comprises 45% of the blood.

(a)  

Heart is located behind the (a)   , which is a bone at the center of the chest cavity.

contraction of the heart

(a)  

It refers to the rhythmic bulging of arteries that are situated at the wrist and other parts of the body.

(a)  

(a)   circulation refers to the circulation of blood from the heart to the lungs back to the heart.

number of chambers in our heart

(a)  

known as the receiving chambers

(a)  

known as the pumping chambers

(a)  

It pumps the blood throughout our body.

(a)  

Its main purpose it to increase immunity and protect the body from pathogens.

(a)  

Give a way on how to protect our circulatory and respiratory system.