Circulatory System

Question 1

Circulatory System

Answer 1

Question 2

Heart

Answer 2

Blood coming into the heart from the body (right side) is deoxygenated.
Deoxygenated blood has a lower concentration of oxygen, and a higher concentration of carbon dioxide.
Blood coming into the heart from the lungs (left side) is oxygenated.

Question 3

Blood Vessels

Answer 3

Arteries carry blood away from the heart and into the organs – where it splits into arterioles, and further into capillaries. Through the thin walls of the capillaries, oxygen and nutrients pass from blood into tissues, and waste products pass from tissues into blood. From the capillaries, blood passes into venules, then into veins to carry blood back from an organ to the heart.

Question 4

Blood

Answer 4

Blood moves through the vessels of a circulatory system. haemoglobin in red blood cells transports oxygen and nutrients to the lungs and tissues. forming blood clots to prevent excess blood loss. carrying cells and antibodies that fight infection. bringing waste products to the kidneys and liver, which filter and clean the blood.

Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in.
Red blood cells are responsible for carrying oxygen and carbon dioxide.
Platelets are responsible for blood clotting.
White blood cells function in immune response.