Question

please help guys my exam paper ​

Answer 1

Explanation:

The four main functions of the heart are:

The four main functions of the heart are:Pumping oxygenated blood to the other body parts.

The four main functions of the heart are:Pumping oxygenated blood to the other body parts.Pumping hormones and other vital substances to different parts of the body.

The four main functions of the heart are:Pumping oxygenated blood to the other body parts.Pumping hormones and other vital substances to different parts of the body.Receiving deoxygenated blood and carrying metabolic waste products from the body and pumping it to the lungs for oxygenation.

The four main functions of the heart are:Pumping oxygenated blood to the other body parts.Pumping hormones and other vital substances to different parts of the body.Receiving deoxygenated blood and carrying metabolic waste products from the body and pumping it to the lungs for oxygenation.Maintaining blood pressure.

3.Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them.

Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them.They help to connect your arteries and veins in addition to facilitating the exchange of certain elements between your blood and tissues

Answer 2

Answer:

Define:

1. Acid: Substance with particular chemical properties including turning litmus red, neutralising alkalis and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind.

2. Respiration: The act of process of breathing: the inhaling of oxygen and the exhaling of carbon dioxide.