E$.$ Very short answer questions

I. Define the following.

Plasma

Red blood cells

Excretion

Ascent of sap

Vascular system

Translocation

Osmosis

Transpiration

II$.$ Give one$-$ or two$-$word answer for the following.

Lower organisms get oxygen directly through this process.

These are present in the blood and help the blood to clot.

They carry deoxygenated blood from tissues from different parts of the body to the lungs.

A vertical, thick, muscular wall that divides heart into two halves.

The process of removal of metabolic wastes from the body.

E$.$ Short answer questions

Name the system responsible for transport of substances in human beings?

Name the organs of excretion in human beings and state their functions.

Write about the functions of the following components of blood.

a$.$ Red blood cells

b$.$ White blood cells

c$.$ Platelets

Why are the walls of the ventricles thicker than that of the auricles?

What prevents the blood from the ventricles to flow back into the auricles when they contract?

Draw a labelled diagram of human excretory system $($explanation not required$).$

What is the pulse rate? How can we check our pulse?

When is dialysis conducted?

Under what conditions will wilting occur in plants?

G$.$ Long answer questions

Describe blood circulation in human beings.

Describe the structure of the heart and state the function of each part.

How are the 'lub$-$dub' sounds produced in the heart? What do they indicate?

Explain the process of excretion in humans.

Write a note on transport system in plants.